155-686: Cygnus is a northern constellation on the plane of the Milky Way , deriving its name from the Latinized Greek word for swan . Cygnus is one of the most recognizable constellations of the northern summer and autumn, and it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross ). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy , and it remains one of
310-425: A celestial coordinate system lies in one of the modern constellations. Some astronomical naming systems include the constellation where a given celestial object is found to convey its approximate location in the sky. The Flamsteed designation of a star, for example, consists of a number and the genitive form of the constellation's name. Other star patterns or groups called asterisms are not constellations under
465-504: A Tuticanus, whose name, Ovid complains, does not fit into meter. The final poem is addressed to an enemy whom Ovid implores to leave him alone. The last elegiac couplet is translated: "Where's the joy in stabbing your steel into my dead flesh?/ There's no place left where I can be dealt fresh wounds." One loss, which Ovid himself described, is the first five-book edition of the Amores , from which nothing has come down to us. The greatest loss
620-574: A black hole. It is located approximately 2.2 kiloparsecs from the Sun . There is also supergiant variable star in the system which is known as HDE 226868 . Cygnus also contains several other noteworthy X-ray sources. Cygnus X-3 is a microquasar containing a Wolf–Rayet star in orbit around a very compact object, with a period of only 4.8 hours. The system is one of the most intrinsically luminous X-ray sources observed. The system undergoes periodic outbursts of unknown nature, and during one such outburst,
775-468: A boy from Aetolia who throws himself off a cliff when his companion Phyllius refuses to give him a tamed bull that he demands, but he is transformed into a swan and flies away. He also mentions a son of Poseidon , an invulnerable warrior in the Trojan War who is eventually killed by Achilles , but Poseidon saves him by transforming him into a swan. Together with other avian constellations near
930-421: A collection of twenty-one poems in elegiac couplets. The Heroides take the form of letters addressed by famous mythological characters to their partners expressing their emotions at being separated from them, pleas for their return, and allusions to their future actions within their own mythology. The authenticity of the collection, partially or as a whole, has been questioned, although most scholars would consider
1085-472: A doctor and utilizes medical imagery. Some have interpreted this poem as the close of Ovid's didactic cycle of love poetry and the end of his erotic elegiac project. The Metamorphoses , Ovid's most ambitious and well-known work, consists of a 15-book catalogue written in dactylic hexameter about transformations in Greek and Roman mythology set within a loose mytho-historical framework. The word "metamorphoses"
1240-445: A friend of poets in the circle of Maecenas . In Tristia 4.10.41–54, Ovid mentions friendships with Macer, Propertius , Ponticus and Bassus, and claims to have heard Horace recite. He only barely met Virgil and Tibullus , a fellow member of Messalla's circle, whose elegies he admired greatly. He married three times and had divorced twice by the time he was thirty. He had one daughter and grandchildren through her. His last wife
1395-466: A guardian to let the poet see Corinna, poem 6 is a lament for Corinna's dead parrot; poems 7 and 8 deal with Ovid's affair with Corinna's servant and her discovery of it, and 11 and 12 try to prevent Corinna from going on vacation. Poem 13 is a prayer to Isis for Corinna's illness, 14 a poem against abortion, and 19 a warning to unwary husbands. Book 3 has 15 poems. The opening piece depicts personified Tragedy and Elegy fighting over Ovid. Poem 2 describes
1550-607: A hundred stars in Cygnus with known planets, the most of any constellation. One of the most notable systems is the Kepler-11 system, containing six transiting planets , all within a plane of approximately one degree. It was the system with six exoplanets to be discovered. With a spectral type of G6V, the star is somewhat cooler than the Sun. The planets are very close to the star; all but the last planet are closer to Kepler-11 than Mercury
1705-464: A later addition to the corpus because they are never mentioned by Ovid and may or may not be spurious. The Heroides markedly reveal the influence of rhetorical declamation and may derive from Ovid's interest in rhetorical suasoriae , persuasive speeches, and ethopoeia , the practice of speaking in another character. They also play with generic conventions; most of the letters seem to refer to works in which these characters were significant, such as
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#17327828031321860-452: A list of 88 constellations with three-letter abbreviations for them. However, these constellations did not have clear borders between them. In 1928, the IAU formally accepted the 88 modern constellations, with contiguous boundaries along vertical and horizontal lines of right ascension and declination developed by Eugene Delporte that, together, cover the entire celestial sphere; this list
2015-421: A long tradition of observing celestial phenomena. Nonspecific Chinese star names , later categorized in the twenty-eight mansions , have been found on oracle bones from Anyang , dating back to the middle Shang dynasty . These constellations are some of the most important observations of Chinese sky, attested from the 5th century BC. Parallels to the earliest Babylonian (Sumerian) star catalogues suggest that
2170-507: A lover; Ovid then digresses on the story of Vulcan's trap for Venus and Mars . The book ends with Ovid asking his "students" to spread his fame. Book 3 opens with a vindication of women's abilities and Ovid's resolution to arm women against his teaching in the first two books. Ovid gives women detailed instructions on appearance telling them to avoid too many adornments. He advises women to read elegiac poetry, learn to play games, sleep with people of different ages, flirt, and dissemble. Throughout
2325-450: A noon tryst, introduces Corinna by name. Poems 8 and 9 deal with Corinna selling her love for gifts, while 11 and 12 describe the poet's failed attempt to arrange a meeting. Poem 14 discusses Corinna's disastrous experiment in dyeing her hair and 15 stresses the immortality of Ovid and love poets. The second book has 19 pieces; the opening poem tells of Ovid's abandonment of a Gigantomachy in favor of elegy . Poems 2 and 3 are entreaties to
2480-453: A period of 790 years and is 73 light-years from Earth. The primary and secondary, both white stars, are of magnitude 4.8 and 6.2, respectively. The unrelated tertiary component is of magnitude 6.9. Though the tertiary component is visible in binoculars, the primary and secondary currently require a medium-sized amateur telescope to split, as they will through the year 2020. The two stars will be closest between 2043 and 2050, when they will require
2635-511: A piece on the Rape of the Sabine women , Pasiphaë , and Ariadne . Book 2 invokes Apollo and begins with a telling of the story of Icarus . Ovid advises men to avoid giving too many gifts, keep up their appearance, hide affairs, compliment their lovers, and ingratiate themselves with slaves to stay on their lover's good side. The care of Venus for procreation is described as is Apollo's aid in keeping
2790-528: A place among the chief Roman elegists Gallus, Tibullus, and Propertius, of whom he saw himself as the fourth member. By AD 8, Ovid had completed Metamorphoses , a hexameter epic poem in 15 books, which comprehensively catalogs the metamorphoses in Greek and Roman mythology, from the emergence of the cosmos to the apotheosis of Julius Caesar . The stories follow each other in the telling of human beings transformed to new bodies: trees, rocks, animals, flowers, constellations , etc. Simultaneously, he worked on
2945-511: A planetary nebula ( Kronberger 61 , now nicknamed "The Soccer Ball") on old survey photos, confirmed recently in images by the Gemini Observatory; both of these are likely too faint to be detected by eye in a small amateur scope. But a much more obscure and relatively 'tiny' object—one which is readily seen in dark skies by amateur telescopes, under good conditions—is the newly discovered nebula (likely reflection type) associated with
3100-468: A poem about the Roman calendar, of which only the first six books exist – January through June. He learned Sarmatian and Getic . The five books of the elegiac Tristia , a series of poems expressing the poet's despair in exile and advocating his return to Rome, are dated to AD 9–12. The Ibis , an elegiac curse poem attacking an unnamed adversary, may also be dated to this period. The Epistulae ex Ponto ,
3255-405: A poem against criticism (9), and a dream of Cupid (3). Book 4, the final work of Ovid, in 16 poems talks to friends and describes his life as an exile further. Poems 10 and 13 describe Winter and Spring at Tomis, poem 14 is halfhearted praise for Tomis, 7 describes its geography and climate, and 4 and 9 are congratulations on friends for their consulships and requests for help. Poem 12 is addressed to
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#17327828031323410-473: A quark star. 4U 2129+ 47 is another X-ray binary containing a neutron star which undergoes outbursts, as is EXO 2030+ 375 . Cygnus is also home to several variable stars . SS Cygni is a dwarf nova which undergoes outbursts every 7–8 weeks. The system's total magnitude varies from 12th magnitude at its dimmest to 8th magnitude at its brightest. The two objects in the system are incredibly close together, with an orbital period of less than 0.28 days. χ Cygni
3565-750: A series of letters to friends in Rome asking them to effect his return, are thought to be his last compositions, with the first three books published in AD 13 and the fourth book between AD 14 and 16. The exile poetry is particularly emotive and personal. In the Epistulae he claims friendship with the natives of Tomis (in the Tristia they are frightening barbarians) and to have written a poem in their language ( Ex Ponto , 4.13.19–20). Yet he pined for Rome – and for his third wife, addressing many poems to her. Some are also to
3720-472: A series of supports and refutations in the short space of five years. Among the supporting reasons Brown presents are: Ovid's exile is only mentioned by his own work, except in "dubious" passages by Pliny the Elder and Statius , but no other author until the 4th century; that the author of Heroides was able to separate the poetic "I" of his own and real life; and that information on the geography of Tomis
3875-529: A significant year in Roman politics. Along with his brother, who excelled at oratory, Ovid was educated in rhetoric in Rome under the teachers Arellius Fuscus and Porcius Latro . His father wanted him to study rhetoric so that he might practice law. According to Seneca the Elder, Ovid tended to the emotional, not the argumentative pole of rhetoric. Following the death of his brother at 20 years of age, Ovid renounced law and travelled to Athens , Asia Minor , and Sicily . He held minor public posts, as one of
4030-470: A star of magnitude 9 near the nebula's northwest edge. Further to the northwest, there is a dark rift and another bright patch. The whole nebula measures 15 arcminutes in diameter. Sharpless 2–115 is another emission nebula with a complex pattern of light and dark patches. Two pairs of stars appear in the nebula; it is larger near the southwestern pair. The open cluster Berkeley 90 is embedded in this large nebula, which measures 30 by 20 arcminutes. Also of note
4185-405: A teacher of love. Ovid describes the places one can go to find a lover, like the theater, a triumph, which he thoroughly describes, or arena – and ways to get the girl to take notice, including seducing her covertly at a banquet. Choosing the right time is significant, as is getting into her associates' confidence. Ovid emphasizes care of the body for the lover. Mythological digressions include
4340-417: A telescope with larger aperture to split. The stars 30 and 31 Cygni form a contrasting double star similar to the brighter Albireo. The two are visible in binoculars. The primary, 31 Cygni, is an orange-hued star of magnitude 3.8, 1400 light-years from Earth. The secondary, 30 Cygni, appears blue-green. It is of spectral type A5IIIn and magnitude 4.83, and is around 610 light-years from Earth. 31 Cygni itself
4495-406: A theory that is little considered among scholars of Latin civilization today: that Ovid was never exiled from Rome and that all of his exile works are the result of his fertile imagination. This theory was supported and rejected in the 1930s, especially by Dutch authors. In 1985, a research paper by Fitton Brown advanced new arguments in support of Hartman's theory. Brown's article was followed by
4650-534: A thunderbolt, causing it to plummet to the earth into the river Eridanus . According to the myth, Phaethon's close friend or lover, Cygnus of Liguria , grieved bitterly and spent many days diving into the river to collect Phaethon's bones to give him a proper burial. The gods were so touched by Cygnus's devotion that they turned him into a swan and placed him among the stars. In Ovid 's Metamorphoses , there are three people named Cygnus, all of whom are transformed into swans. Alongside Cygnus, noted above, he mentions
4805-464: A visit to the races, 3 and 8 focus on Corinna's interest in other men, 10 is a complaint to Ceres because of her festival that requires abstinence, 13 is a poem on a festival of Juno , and 9 a lament for Tibullus . In poem 11 Ovid decides not to love Corinna any longer and regrets the poems he has written about her. The final poem is Ovid's farewell to the erotic muse. Critics have seen the poems as highly self-conscious and extremely playful specimens of
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4960-443: A yellow star and a red dwarf, also contains a planet. The planet is somewhat similar to Jupiter , but with slightly more mass and a more eccentric orbit. The Kepler-22 system is also notable for having the most Earth-like exoplanet when it was discovered in 2011. The rich background of stars of Cygnus can make it difficult to make out open cluster . M39 (NGC 7092) is an open cluster 950 light-years from Earth that are visible to
5115-421: A young globular cluster . Cygnus A is the first radio galaxy discovered; at a distance of 730 million light-years from Earth, it is the closest powerful radio galaxy. In the visible spectrum , it appears as an elliptical galaxy in a small cluster . It is classified as an active galaxy because the supermassive black hole at its nucleus is accreting matter, which produces two jets of matter from
5270-470: Is one of largest stars currently known in the galaxy with a radius exceeding 1,000 solar radii . Its magnitude is around 16.6, its period is about 940 days. The star KIC 8462852 (Tabby's Star) has received widespread press coverage because of unusual light fluctuations. Cygnus is one of the constellations that the Kepler satellite surveyed in its search for exoplanets , and as a result, there are about
5425-420: Is 430 light-years away and is visible in large binoculars and all amateur telescopes. γ Cygni , traditionally named Sadr, is a yellow-tinged supergiant star of magnitude 2.2, 1800 light-years away. Its traditional name means "breast" and refers to its position in the constellation. δ Cygni (the proper name is Fawaris) is another bright binary star in Cygnus, 166 light-years with a period of 800 years. The primary
5580-454: Is Ovid's only tragedy, Medea , from which only a few lines are preserved. Quintilian admired the work a great deal and considered it a prime example of Ovid's poetic talent. Lactantius quotes from a lost translation by Ovid of Aratus ' Phaenomena , although the poem's ascription to Ovid is insecure because it is never mentioned in Ovid's other works. A line from a work entitled Epigrammata
5735-483: Is a red giant and the second-brightest Mira variable star at its maximum. It ranges between magnitudes 3.3 and 14.2, and spectral types S6,2e to S10,4e (MSe) over a period of 408 days; it has a diameter of 300 solar diameters and is 350 light-years from Earth. P Cygni is a luminous blue variable that brightened suddenly to 3rd magnitude in 1600 AD. Since 1715, the star has been of 5th magnitude, despite being more than 5000 light-years from Earth. The star's spectrum
5890-449: Is a binary star; the tertiary component is a blue star of magnitude 7.0. ψ Cygni is a binary star visible in small amateur telescopes, with two white components. The primary is of magnitude 5.0 and the secondary is of magnitude 7.5. 61 Cygni is a binary star visible in large binoculars or a small amateur telescope. It is 11.4 light-years from Earth and has a period of 750 years. Both components are orange-hued dwarf ( main sequence ) stars;
6045-470: Is a blue-white hued giant star of magnitude 2.9, and the secondary is a star of magnitude 6.6. The two components are visible in a medium-sized amateur telescope. The fifth star in Cygnus above magnitude 3 is Aljanah, designated ε Cygni . It is an orange-hued giant star of magnitude 2.5, 72 light-years from Earth. There are several other dimmer double and binary stars in Cygnus. μ Cygni is a binary star with an optical tertiary component. The binary system has
6200-400: Is a didactic elegiac poem in three books that sets out to teach the arts of seduction and love. The first book addresses men and teaches them how to seduce women, the second, also to men, teaches how to keep a lover. The third addresses women and teaches seduction techniques. The first book opens with an invocation to Venus, in which Ovid establishes himself as a praeceptor amoris (1.17) –
6355-574: Is a faint open cluster with up to 22 stars visible in small and medium-sized amateur telescopes. Nebulosity is visible to the north and east of the cluster, which is 7 arcminutes in diameter. The brightest star appears in the eastern part of the cluster and is of the 7th magnitude; another bright star has a yellow hue. Dolidze 11 is an open cluster 400 million years old, farthest away of the three at 3700 light-years. More than 10 stars are visible in an amateur instrument in this cluster, of similar size to Dolidze 9 at 7 arcminutes in diameter, whose brightest star
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6510-523: Is also called the Cygnus Loop . The Loop is only visible in long-exposure astrophotographs. However, the brightest portion, NGC 6992, is faintly visible in binoculars, and a dimmer portion, NGC 6960, is visible in wide-angle telescopes. The DR 6 cluster is also nicknamed the "Galactic Ghoul" because of the nebula's resemblance to a human face; The Gamma Cygni Nebula (IC 1318) includes both bright and dark nebulae in an area of over 4 degrees. DWB 87
6665-491: Is also known for works in elegiac couplets such as Ars Amatoria ("The Art of Love") and Fasti . His poetry was much imitated during Late Antiquity and the Middle Ages , and greatly influenced Western art and literature . The Metamorphoses remains one of the most important sources of classical mythology today. Ovid wrote more about his own life than most other Roman poets. Information about his biography
6820-482: Is another of the many bright emission nebulae in Cygnus, 7.8 by 4.3 arcminutes. It is in the Gamma Cygni area. Two other emission nebulae include Sharpless 2-112 and Sharpless 2-115 . When viewed in an amateur telescope, Sharpless 2–112 appears to be in a teardrop shape. More of the nebula's eastern portion is visible with an O III (doubly ionized oxygen) filter. There is an orange star of magnitude 10 nearby and
6975-474: Is drawn primarily from his poetry, especially Tristia 4.10, which gives a lengthy autobiographical account of his life. Other sources include Seneca the Elder and Quintilian . Ovid was born in the Paelignian town of Sulmo (modern-day Sulmona , in the province of L'Aquila , Abruzzo), in an Apennine valley east of Rome , to an important equestrian family, the gens Ovidia , on 20 March 43 BC –
7130-601: Is going to use his abilities to hurt his enemy. He cites Callimachus' Ibis as his inspiration and calls all the gods to make his curse effective. Ovid uses mythical exempla to condemn his enemy in the afterlife, cites evil prodigies that attended his birth, and then in the next 300 lines wishes that the torments of mythological characters befall his enemy. The poem ends with a prayer that the gods make his curse effective. The Tristia consist of five books of elegiac poetry composed by Ovid in exile in Tomis. Book 1 contains 11 poems;
7285-545: Is of Greek origin and means "transformations". Appropriately, the characters in this work undergo many different transformations. Within an extent of nearly 12,000 verses, almost 250 different myths are mentioned. Each myth is set outdoors where the mortals are often vulnerable to external influences. The poem stands in the tradition of mythological and etiological catalogue poetry such as Hesiod 's Catalogue of Women , Callimachus ' Aetia , Nicander 's Heteroeumena , and Parthenius ' Metamorphoses . The first book describes
7440-465: Is of magnitude 7.5. It, too, has nebulosity in the east. Collinder 421 is a particularly old open cluster at an age of approximately 1 billion years; it is of magnitude 10.1. 3100 light-years from Earth, more than 30 stars are visible in a diameter of 8 arcseconds. The prominent star in the north of the cluster has a golden color, whereas the stars in the south of the cluster appear orange. Collinder 421 appears to be embedded in nebulosity, which extends past
7595-530: Is so large; at its widest, the North America Nebula is 2 degrees across. Illuminated by a hot embedded star of magnitude 6, NGC 7000 is 1500 light-years from Earth. To the south of Epsilon Cygni is the Veil Nebula (NGC 6960, 6979, 6992, and 6995), a 5,000-year-old supernova remnant covering approximately 3 degrees of the sky - it is over 50 light-years long. Because of its appearance, it
7750-571: Is the Crescent Nebula (NGC 6888), located between Gamma and Eta Cygni, which was formed by the Wolf–Rayet star HD 192163 . In recent years, amateur astronomers have made some notable Cygnus discoveries. The " Soap bubble nebula " (PN G75.5+1.7), near the Crescent nebula, was discovered on a digital image by Dave Jurasevich in 2007. In 2011, Austrian amateur Matthias Kronberger discovered
7905-645: Is the Suzhou Astronomical Chart , which was prepared with carvings of stars on the planisphere of the Chinese sky on a stone plate; it is done accurately based on observations, and it shows the supernova of the year of 1054 in Taurus. Influenced by European astronomy during the late Ming dynasty , charts depicted more stars but retained the traditional constellations. Newly observed stars were incorporated as supplementary to old constellations in
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#17327828031328060-424: Is to the Sun, and all the planets are more massive than Earth, and have low densities. The planets have low densities. The naked-eye star 16 Cygni , a triple star approximately 70 light-years from Earth composed two Sun-like stars and a red dwarf , contains a planet orbiting one of the sun-like stars, found due to variations in the star's radial velocity. Gliese 777 , another naked-eye multiple star system containing
8215-448: Is unusual in that it contains very strong emission lines resulting from surrounding nebulosity. W Cygni is a semi-regular variable red giant star, 618 light-years from Earth.It has a maximum magnitude of 5.10 and a minimum magnitude 6.83; its period of 131 days. It is a red giant ranging between spectral types M4e-M6e(Tc:)III, NML Cygni is a red hypergiant semi-regular variable star located at 5,300 light-years away from Earth. It
8370-601: The Ars Amatoria (the Art of Love ), a parody of didactic poetry and a three-book manual about seduction and intrigue, which has been dated to AD 2 (Books 1–2 would go back to 1 BC ). Ovid may identify this work in his exile poetry as the carmen , or song, which was one cause of his banishment. The Ars Amatoria was followed by the Remedia Amoris in the same year. This corpus of elegiac, erotic poetry earned Ovid
8525-688: The Ars Amatoria concerned the serious crime of adultery . He may have been banished for these works, which appeared subversive to the emperor's moral legislation. However, in view of the long time that elapsed between the publication of this work (1 BC) and the exile (AD 8), some authors suggest that Augustus used the poem as a mere justification for something more personal. In exile, Ovid wrote two poetry collections, Tristia and Epistulae ex Ponto , which illustrated his sadness and desolation. Being far from Rome, he had no access to libraries, and thus might have been forced to abandon his Fasti ,
8680-651: The Aeneid in the case of Dido and Catullus 64 for Ariadne, and transfer characters from the genres of epic and tragedy to the elegiac genre of the Heroides . The letters have been admired for their deep psychological portrayals of mythical characters, their rhetoric, and their unique attitude to the classical tradition of mythology. They also contribute significantly to conversations on how gender and identity were constructed in Augustan Rome. A popular quote from
8835-462: The Fasti , a six-book poem in elegiac couplets on the theme of the calendar of Roman festivals and astronomy. The composition of this poem was interrupted by Ovid's exile, and it is thought that Ovid abandoned work on the piece in Tomis. It is probably in this period that the double letters (16–21) in the Heroides were composed, although there is some contention over their authorship. In AD 8, Ovid
8990-500: The tresviri capitales , as a member of the Centumviral court and as one of the decemviri litibus iudicandis , but resigned to pursue poetry probably around 29–25 BC, a decision of which his father apparently disapproved. Ovid's first recitation has been dated to around 25 BC, when he was eighteen. He was part of the circle centered on the esteemed patron Marcus Valerius Messalla Corvinus , and likewise seems to have been
9145-500: The Ars Amatoria , and is primarily addressed to men. The poem criticizes suicide as a means for escaping love and, invoking Apollo, goes on to tell lovers not to procrastinate and be lazy in dealing with love. Lovers are taught to avoid their partners, not perform magic, see their lover unprepared, take other lovers, and never be jealous. Old letters should be burned and the lover's family avoided. The poem throughout presents Ovid as
9300-539: The Bayer designations from Alpha to Omega and then using lowercase Roman letters to g. John Flamsteed added the Roman letters h, i, k, l and m (these stars were considered informes by Bayer as they lay outside the asterism of Cygnus), but were dropped by Francis Baily . There are several bright stars in Cygnus. α Cygni, called Deneb , is the brightest star in Cygnus. It is a white supergiant star of spectral type A2Iae that varies between magnitudes 1.21 and 1.29, one of
9455-790: The Inca civilization identified various dark areas or dark nebulae in the Milky Way as animals and associated their appearance with the seasonal rains. Australian Aboriginal astronomy also describes dark cloud constellations, the most famous being the "emu in the sky" whose head is formed by the Coalsack , a dark nebula, instead of the stars. Footnotes Citations Ovid Publius Ovidius Naso ( Latin: [ˈpuːbliʊs ɔˈwɪdiʊs ˈnaːso(ː)] ; 20 March 43 BC – AD 17/18), known in English as Ovid ( / ˈ ɒ v ɪ d / OV -id ),
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#17327828031329610-564: The KJV , but ‘Ayish "the bier" actually corresponding to Ursa Major. The term Mazzaroth מַזָּרוֹת , translated as a garland of crowns , is a hapax legomenon in Job 38:32, and it might refer to the zodiacal constellations. There is only limited information on ancient Greek constellations, with some fragmentary evidence being found in the Works and Days of the Greek poet Hesiod , who mentioned
9765-550: The Metamorphoses , scholars have focused on Ovid's organization of his vast body of material. The ways that stories are linked by geography, themes, or contrasts creates interesting effects and constantly forces the reader to evaluate the connections. Ovid also varies his tone and material from different literary genres; G. B. Conte has called the poem "a sort of gallery of these various literary genres". In this spirit, Ovid engages creatively with his predecessors, alluding to
9920-509: The Metamorphoses , the Fasti was to be a long poem and emulated etiological poetry by writers like Callimachus and, more recently, Propertius and his fourth book. The poem goes through the Roman calendar, explaining the origins and customs of important Roman festivals, digressing on mythical stories, and giving astronomical and agricultural information appropriate to the season. The poem was probably dedicated to Augustus initially, but perhaps
10075-693: The Society Islands it was called Pirae-tea or Taurua-i-te-haapa-raa-manu , and in the Tuamotus it was called Fanui-raro . Beta Cygni was named in New Zealand; it was likely called Whetu-kaupo . Gamma Cygni was called Fanui-runga in the Tuamotus. Deneb was also often a given name, in the Islamic world of astronomy . The name Deneb comes from the Arabic name dhaneb , meaning "tail", from
10230-623: The Zodiac of Dendera ; it remains unclear when this occurred, but most were placed during the Roman period between 2nd to 4th centuries AD. The oldest known depiction of the zodiac showing all the now familiar constellations, along with some original Egyptian constellations, decans , and planets . Ptolemy's Almagest remained the standard definition of constellations in the medieval period both in Europe and in Islamic astronomy . Ancient China had
10385-476: The battle of the centaurs , and Iphigeneia . The thirteenth book discusses the contest over Achilles' arms , and Polyphemus . The fourteenth moves to Italy, describing the journey of Aeneas , Pomona and Vertumnus , and Romulus and Hersilia . The final book opens with a philosophical lecture by Pythagoras and the deification of Caesar . The end of the poem praises Augustus and expresses Ovid's belief that his poem has earned him immortality. In analyzing
10540-592: The horizon when viewed from a particular latitude on Earth is termed circumpolar . From the North Pole or South Pole , all constellations south or north of the celestial equator are circumpolar . Depending on the definition, equatorial constellations may include those that lie between declinations 45° north and 45° south, or those that pass through the declination range of the ecliptic (or zodiac ) ranging between 23.5° north and 23.5° south . Stars in constellations can appear near each other in
10695-487: The summer solstice , Vultur cadens and Aquila , Cygnus may be a significant part of the origin of the myth of the Stymphalian Birds , one of The Twelve Labours of Hercules . A very large constellation, Cygnus is bordered by Cepheus to the north and east, Draco to the north and west, Lyra to the west, Vulpecula to the south, Pegasus to the southeast and Lacerta to the east. The three-letter abbreviation for
10850-535: The zodiac (straddling the ecliptic , which the Sun , Moon , and planets all traverse). The origins of the zodiac remain historically uncertain; its astrological divisions became prominent c. 400 BC in Babylonian or Chaldean astronomy. Constellations appear in Western culture via Greece and are mentioned in the works of Hesiod , Eudoxus and Aratus . The traditional 48 constellations, consisting of
11005-458: The "heavenly bodies". Greek astronomy essentially adopted the older Babylonian system in the Hellenistic era , first introduced to Greece by Eudoxus of Cnidus in the 4th century BC. The original work of Eudoxus is lost, but it survives as a versification by Aratus , dating to the 3rd century BC. The most complete existing works dealing with the mythical origins of the constellations are by
11160-607: The 14th century. The Ancient Greek word for constellation is ἄστρον ( astron ). These terms historically referred to any recognisable pattern of stars whose appearance was associated with mythological characters or creatures, earthbound animals, or objects. Over time, among European astronomers, the constellations became clearly defined and widely recognised. In the 20th century, the International Astronomical Union (IAU) recognized 88 constellations . A constellation or star that never sets below
11315-529: The 17,000-year-old cave paintings in Lascaux , southern France, depict star constellations such as Taurus, Orion's Belt, and the Pleiades. However, this view is not generally accepted among scientists. Inscribed stones and clay writing tablets from Mesopotamia (in modern Iraq) dating to 3000 BC provide the earliest generally accepted evidence for humankind's identification of constellations. It seems that
11470-477: The 17th-century German celestial cartographer Johann Bayer 's star atlas the Uranometria , Alpha, Beta and Gamma Cygni form the pole of a cross, while Delta and Epsilon form the cross beam. The nova P Cygni was then considered to be the body of Christ. There is an abundance of deep-sky objects , with many open clusters , nebulae of various types and supernova remnants found in Cygnus due to its position on
11625-556: The 88 IAU-recognized constellations in this region first appeared on celestial globes developed in the late 16th century by Petrus Plancius , based mainly on observations of the Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman . These became widely known through Johann Bayer 's star atlas Uranometria of 1603. Fourteen more were created in 1763 by the French astronomer Nicolas Louis de Lacaille , who also split
11780-504: The 88 modern constellations. Cygnus contains Deneb (ذنب, translit. ḏanab, tail) – one of the brightest stars in the night sky and the most distant first-magnitude star – as its "tail star" and one corner of the Summer Triangle the constellation forming an east pointing altitude of the triangle . It also has some notable X-ray sources and the giant stellar association of Cygnus OB2 . One of
11935-614: The Emperor Augustus, yet others are to himself, to friends in Rome, and sometimes to the poems themselves, expressing loneliness and hope of recall from banishment or exile. The obscure causes of Ovid's exile have given rise to much speculation by scholars. The medieval texts that mention the exile offer no credible explanations: their statements seem incorrect interpretations drawn from the works of Ovid. Ovid himself wrote many references to his offense, giving obscure or contradictory clues. In 1923, scholar J. J. Hartman proposed
12090-742: The Hellenistic writer termed pseudo-Eratosthenes and an early Roman writer styled pseudo- Hyginus . The basis of Western astronomy as taught during Late Antiquity and until the Early Modern period is the Almagest by Ptolemy , written in the 2nd century. In the Ptolemaic Kingdom , native Egyptian tradition of anthropomorphic figures represented the planets, stars, and various constellations. Some of these were combined with Greek and Babylonian astronomical systems culminating in
12245-464: The Heroides anticipates Machiavelli's "the end justifies the means". Ovid had written "Exitus acta probat" – the result justifies the means. The Amores is a collection in three books of love poetry in elegiac meter, following the conventions of the elegiac genre developed by Tibullus and Propertius . Elegy originates with Propertius and Tibullus, but Ovid is an innovator in the genre. Ovid changes
12400-504: The IAU as well as those by cultures throughout history are imagined figures and shapes derived from the patterns of stars in the observable sky. Many officially recognized constellations are based on the imaginations of ancient, Near Eastern and Mediterranean mythologies. Some of these stories seem to relate to the appearance of the constellations, e.g. the assassination of Orion by Scorpius, their constellations appearing at opposite times of year. Constellation positions change throughout
12555-665: The Milky Way. Its molecular clouds form the Cygnus Rift dark nebula constellation , comprising one end of the Great Rift along the Milky Way's galactic plane . The rift begins around the Northern Coalsack , and partially obscures the larger Cygnus molecular cloud complex behind it, which the North America Nebula is part of. Bayer catalogued many stars in the constellation, giving them
12710-572: The Navigator in c. 500 BC. The history of southern constellations is not straightforward. Different groupings and different names were proposed by various observers, some reflecting national traditions or designed to promote various sponsors. Southern constellations were important from the 14th to 16th centuries, when sailors used the stars for celestial navigation . Italian explorers who recorded new southern constellations include Andrea Corsali , Antonio Pigafetta , and Amerigo Vespucci . Many of
12865-509: The Palomar Observatory survey photos in 2005 but had not published it for others to confirm and analyze at the time of Waldee's first official notices and later 2010 paper. Cygnus X is the largest star-forming region in the solar neighborhood and includes not only some of the brightest and most massive stars known (such as Cygnus OB2-12 ), but also Cygnus OB2 , a massive stellar association classified by some authors as
13020-471: The Younger and Agrippa Postumus (the latter adopted by him), were also banished around the same time. Julia's husband, Lucius Aemilius Paullus , was put to death for a conspiracy against Augustus , a conspiracy of which Ovid potentially knew. The Julian marriage laws of 18 BC , which promoted monogamous marriage to increase the population's birth rate, were fresh in the Roman mind. Ovid's writing in
13175-647: The ancient Chinese system did not arise independently. Three schools of classical Chinese astronomy in the Han period are attributed to astronomers of the earlier Warring States period . The constellations of the three schools were conflated into a single system by Chen Zhuo , an astronomer of the 3rd century ( Three Kingdoms period ). Chen Zhuo's work has been lost, but information on his system of constellations survives in Tang period records, notably by Qutan Xida . The oldest extant Chinese star chart dates to that period and
13330-409: The ancient constellation Argo Navis into three; these new figures appeared in his star catalogue, published in 1756. Several modern proposals have not survived. The French astronomers Pierre Lemonnier and Joseph Lalande , for example, proposed constellations that were once popular but have since been dropped. The northern constellation Quadrans Muralis survived into the 19th century (when its name
13485-419: The book, Ovid playfully interjects, criticizing himself for undoing all his didactic work to men and mythologically digresses on the story of Procris and Cephalus . The book ends with his wish that women will follow his advice and spread his fame saying Naso magister erat, "Ovid was our teacher". (Ovid was known as "Naso" to his contemporaries. ) This elegiac poem proposes a cure for the love Ovid teaches in
13640-593: The bottom of the toy it is named for. A larger amateur instrument reveals 8 more stars, nebulosity to the east and west of the cluster, and a diameter of 9 arcminutes. The nebulosity in this region is part of the Gamma Cygni Nebula . The other stars, approximately 3700 light-years from Earth, are mostly blue-white and very hot. Other open clusters in Cygnus include Dolidze 9 , Collinder 421 , Dolidze 11 , and Berkeley 90 . Dolidze 9, 2800 light-years from Earth and relatively young at 20 million light-years old,
13795-733: The bulk of the Mesopotamian constellations were created within a relatively short interval from around 1300 to 1000 BC. Mesopotamian constellations appeared later in many of the classical Greek constellations. The oldest Babylonian catalogues of stars and constellations date back to the beginning of the Middle Bronze Age , most notably the Three Stars Each texts and the MUL.APIN , an expanded and revised version based on more accurate observation from around 1000 BC. However,
13950-550: The capital of the newly-organised province of Moesia , on the Black Sea , where he remained for the last nine or ten years of his life. Ovid himself attributed his banishment to a "poem and a mistake", but his reluctance to disclose specifics has resulted in much speculation among scholars. Ovid is most famous for the Metamorphoses , a continuous mythological narrative in fifteen books written in dactylic hexameters . He
14105-655: The celestial equator), and southern constellations Puppis , Vela , Carina , Crux , Centaurus , Triangulum Australe , and Ara . Polaris , being the North Star, is the approximate center of the northern celestial hemisphere. It is part of Ursa Minor , constituting the end of the Little Dipper's handle. From latitudes of around 35° north, in January, Ursa Major (containing the Big Dipper ) appears to
14260-505: The cluster's borders to its west. Berkeley 90 is a smaller open cluster, with a diameter of 5 arcminutes. More than 16 members appear in an amateur telescope. NGC 6826 , the Blinking Planetary Nebula, is a planetary nebula with a magnitude of 8.5, 3200 light-years from Earth. It appears to "blink" in the eyepiece of a telescope because its central star is unusually bright (10th magnitude). When an observer focuses on
14415-491: The constellation Orion : A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellations were likely defined in prehistory . People used them to relate stories of their beliefs, experiences, creation , and mythology . Different cultures and countries invented their own constellations, some of which lasted into
14570-438: The constellation, as adopted by the IAU in 1922, is "Cyg". The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined as a polygon of 28 segments. In the equatorial coordinate system , the right ascension coordinates of these borders lie between 19 07.3 and 22 02.3 , while the declination coordinates are between 27.73° and 61.36°. Covering 804 square degrees and around 1.9% of
14725-528: The date is uncertain as it depends on a notice in Am. 2.18.19–26 that seems to describe the collection as an early published work. The authenticity of some of these poems has been challenged, but this first edition probably contained the first 14 poems of the collection. The first five-book collection of the Amores , a series of erotic poems addressed to a lover, Corinna, is thought to have been published in 16–15 BC;
14880-661: The daytime and lower at night, while in winter the reverse is true, for both hemispheres. Due to the Solar System 's 60° tilt, the galactic plane of the Milky Way is inclined 60° from the ecliptic, between Taurus and Gemini (north) and Scorpius and Sagittarius (south and near which the Galactic Center can be found). The galaxy appears to pass through Aquila (near the celestial equator) and northern constellations Cygnus , Cassiopeia , Perseus , Auriga , and Orion (near Betelgeuse ), as well as Monoceros (near
15035-567: The death of the emperor prompted Ovid to change the dedication to honor Germanicus . Ovid uses direct inquiry of gods and scholarly research to talk about the calendar and regularly calls himself a vates , a seer. He also seems to emphasize unsavory, popular traditions of the festivals, imbuing the poem with a popular, plebeian flavor, which some have interpreted as subversive to the Augustan moral legislation. While this poem has always been invaluable to students of Roman religion and culture for
15190-524: The development of today's accepted modern constellations. The southern sky, below about −65° declination , was only partially catalogued by ancient Babylonians, Egyptians, Greeks, Chinese, and Persian astronomers of the north. The knowledge that northern and southern star patterns differed goes back to Classical writers, who describe, for example, the African circumnavigation expedition commissioned by Egyptian Pharaoh Necho II in c. 600 BC and those of Hanno
15345-432: The early 20th century before today's constellations were internationally recognized. The recognition of constellations has changed significantly over time. Many changed in size or shape. Some became popular, only to drop into obscurity. Some were limited to a single culture or nation. Naming constellations also helped astronomers and navigators identify stars more easily. Twelve (or thirteen) ancient constellations belong to
15500-399: The early constellations were never universally adopted. Stars were often grouped into constellations differently by different observers, and the arbitrary constellation boundaries often led to confusion as to which constellation a celestial object belonged. Before astronomers delineated precise boundaries (starting in the 19th century), constellations generally appeared as ill-defined regions of
15655-548: The east has part of the Hercules–Corona Borealis Great Wall in the deep sky , a giant galaxy filament that is the largest known structure in the observable universe, covering most of the northern sky. In Polynesia , Cygnus was often recognized as a separate constellation. In Tonga it was called Tuula-lupe , and in the Tuamotus it was called Fanui-tai . In New Zealand it was called Mara-tea , in
15810-425: The ecliptic), approximating a great circle . Zodiacal constellations of the northern sky are Pisces , Aries , Taurus , Gemini , Cancer , and Leo . In the southern sky are Virgo , Libra , Scorpius , Sagittarius , Capricornus , and Aquarius . The zodiac appears directly overhead from latitudes of 23.5° north to 23.5° south, depending on the time of year. In summer, the ecliptic appears higher up in
15965-618: The elegiac genre. About a hundred elegiac lines survive from this poem on beauty treatments for women's faces, which seems to parody serious didactic poetry. The poem says that women should concern themselves first with manners and then prescribes several compounds for facial treatments before breaking off. The style is not unlike the shorter Hellenistic didactic works of Nicander and Aratus . Si quis in hoc artem populo non novit amandi, hoc legat et lecto carmine doctus amet. The Ars Amatoria
16120-466: The emperor for forgiveness. Book 3 in 14 poems focuses on Ovid's life in Tomis. The opening poem describes his book's arrival in Rome to find Ovid's works banned. Poems 10, 12, and 13 focus on the seasons spent in Tomis, 9 on the origins of the place, and 2, 3, and 11 his emotional distress and longing for home. The final poem is again an apology for his work. The fourth book has ten poems addressed mostly to friends. Poem 1 expresses his love of poetry and
16275-501: The first piece is an address by Ovid to his book about how it should act when it arrives in Rome. Poem 3 describes his final night in Rome, poems 2 and 10 Ovid's voyage to Tomis, 8 the betrayal of a friend, and 5 and 6 the loyalty of his friends and wife. In the final poem Ovid apologizes for the quality and tone of his book, a sentiment echoed throughout the collection. Book 2 consists of one long poem in which Ovid defends himself and his poetry, uses precedents to justify his work, and begs
16430-464: The first semester of the year, with each book dedicated to a different month of the Roman calendar (January to June). The project seems unprecedented in Roman literature. It seems that Ovid planned to cover the whole year, but was unable to finish because of his exile, although he did revise sections of the work at Tomis, and he claims at Trist. 2.549–52 that his work was interrupted after six books. Like
16585-507: The form of star charts , whose oldest representation appears on the statue known as the Farnese Atlas , based perhaps on the star catalogue of the Greek astronomer Hipparchus . Southern constellations are more modern inventions, sometimes as substitutes for ancient constellations (e.g. Argo Navis ). Some southern constellations had long names that were shortened to more usable forms; e.g. Musca Australis became simply Musca. Some of
16740-621: The formal definition, but are also used by observers to navigate the night sky. Asterisms may be several stars within a constellation, or they may share stars with more than one constellation. Examples of asterisms include the teapot within the constellation Sagittarius , or the big dipper in the constellation of Ursa Major . The word constellation comes from the Late Latin term cōnstellātiō , which can be translated as "set of stars"; it came into use in Middle English during
16895-502: The formation of such rays. Cygnus X-2 is another X-ray binary , containing an A-type giant in orbit around a neutron star with a 9.8-day period. The system is interesting due to the rather small mass of the companion star, as most millisecond pulsars have much more massive companions. Another black hole in Cygnus is V404 Cygni , which consists of a K-type star orbiting around a black hole of around 12 solar masses. The black hole, similar to that of Cygnus X-3, has been hypothesized to be
17050-507: The formation of the world, the ages of man , the flood , the story of Daphne 's rape by Apollo and Io 's by Jupiter. The second book opens with Phaethon and continues describing the love of Jupiter with Callisto and Europa . The third book focuses on the mythology of Thebes with the stories of Cadmus , Actaeon , and Pentheus . The fourth book focuses on three pairs of lovers: Pyramus and Thisbe , Salmacis and Hermaphroditus , and Perseus and Andromeda . The fifth book focuses on
17205-475: The full spectrum of classical poetry. Ovid's use of Alexandrian epic, or elegiac couplets, shows his fusion of erotic and psychological style with traditional forms of epic. A concept drawn from the Metamorphoses is the idea of the white lie or pious fraud : "pia mendacia fraude". Six books in elegiacs survive of this second ambitious poem that Ovid was working on when he was exiled. The six books cover
17360-432: The historical Sappho to Phaon , seems spurious (although referred to in Am. 2.18) because of its length, its lack of integration in the mythological theme, and its absence from Medieval manuscripts. The final letters (16–21) are paired compositions comprising a letter to a lover and a reply. Paris and Helen , Hero and Leander , and Acontius and Cydippe are the addressees of the paired letters. These are considered
17515-420: The largest and most luminous A-class stars known. It is located about 2600 light-years away. Its traditional name means "tail" and refers to its position in the constellation. Albireo , designated β Cygni, is a celebrated binary star among amateur astronomers for its contrasting hues. The primary is an orange-hued giant star of magnitude 3.1 and the secondary is a blue-green hued star of magnitude 5.1. The system
17670-412: The leader of his elegies from the poet, to Amor (Love or Cupid). This switch in focus from the triumphs of the poet, to the triumphs of love over people is the first of its kind for this genre of poetry. This Ovidian innovation can be summarized as the use of love as a metaphor for poetry. The books describe the many aspects of love and focus on the poet's relationship with a mistress called Corinna. Within
17825-535: The letters mentioned specifically in Ovid's description of the work at Am. 2.18.19–26 as safe from objection. The collection comprises a new type of generic composition without parallel in earlier literature. The first fourteen letters are thought to comprise the first published collection and are written by the heroines Penelope , Phyllis , Briseis , Phaedra , Oenone , Hypsipyle , Dido , Hermione , Deianeira , Ariadne , Canace , Medea , Laodamia , and Hypermnestra to their absent male lovers. Letter 15, from
17980-480: The mid-18th century when European explorers began traveling to the Southern Hemisphere . Due to Roman and European transmission, each constellation has a Latin name. In 1922, the International Astronomical Union (IAU) formally accepted the modern list of 88 constellations , and in 1928 adopted official constellation boundaries that together cover the entire celestial sphere. Any given point in
18135-498: The night sky, Cygnus ranks 16th of the 88 constellations in size. Cygnus culminates at midnight on 29 June, and is most visible in the evening from the early summer to mid-autumn in the Northern Hemisphere. Normally, Cygnus is depicted with Delta and Epsilon Cygni as its wings. Deneb , the brightest in the constellation is at its tail, and Albireo as the tip of its beak. There are several asterisms in Cygnus. In
18290-449: The northeast, while Cassiopeia is the northwest. To the west are Pisces (above the horizon) and Aries. To the southwest Cetus is near the horizon. Up high and to the south are Orion and Taurus. To the southeast above the horizon is Canis Major . Appearing above and to the east of Orion is Gemini : also in the east (and progressively closer to the horizon) are Cancer and Leo. In addition to Taurus, Perseus and Auriga appear overhead. From
18445-602: The numerous Sumerian names in these catalogues suggest that they built on older, but otherwise unattested, Sumerian traditions of the Early Bronze Age . The classical Zodiac is a revision of Neo-Babylonian constellations from the 6th century BC. The Greeks adopted the Babylonian constellations in the 4th century BC. Twenty Ptolemaic constellations are from the Ancient Near East. Another ten have
18600-538: The parts of the southern sky unknown to Ptolemy) by Petrus Plancius (1592, 1597/98 and 1613), Johannes Hevelius (1690) and Nicolas Louis de Lacaille (1763), who introduced fourteen new constellations. Lacaille studied the stars of the southern hemisphere from 1751 until 1752 from the Cape of Good Hope , when he was said to have observed more than 10,000 stars using a refracting telescope with an aperture of 0.5 inches (13 mm). In 1922, Henry Norris Russell produced
18755-458: The phrase Dhanab ad-Dajājah , which means "the tail of the hen". In Greek mythology , Cygnus has been identified with several different legendary swans. Zeus disguised himself as a swan to seduce Leda , Spartan king Tyndareus 's wife, who gave birth to the Gemini , Helen of Troy , and Clytemnestra ; Orpheus was transformed into a swan after his murder, and was said to have been placed in
18910-455: The pole star include Chamaeleon , Apus and Triangulum Australe (near Centaurus), Pavo , Hydrus , and Mensa . Sigma Octantis is the closest star approximating a southern pole star, but is faint in the night sky. Thus, the pole can be triangulated using the constellation Crux as well as the stars Alpha and Beta Centauri (about 30° counterclockwise from Crux) of the constellation Centaurus (arching over Crux). It has been suggested that
19065-480: The poles. The jets' interaction with the interstellar medium creates radio lobes, one source of radio emissions. Cygnus is also the apparent source of the WIMP -wind due to the orientation of the solar system's rotation through the galactic halo. The local Orion-Cygnus Arm and the distant Cygnus Arm are two minor galactic arms named after Cygnus for lying in its background. Constellation Four views of
19220-465: The primary is of magnitude 5.2 and the secondary is of magnitude 6.1. 61 Cygni is significant because Friedrich Wilhelm Bessel determined its parallax in 1838, the first star to have a known parallax. Located near η Cygni is the X-ray source Cygnus X-1 , which is now thought to be caused by a black hole accreting matter in a binary star system. This was the first X-ray source widely believed to be
19375-483: The quality of his poetry. The Epistulae ex Ponto is a collection in four books of further poetry from exile. The Epistulae are each addressed to a different friend and focus more desperately than the Tristia on securing his recall from exile. The poems mainly deal with requests for friends to speak on his behalf to members of the imperial family, discussions of writing with friends, and descriptions of life in exile. The first book has ten pieces in which Ovid describes
19530-632: The same latitude, in July, Cassiopeia (low in the sky) and Cepheus appear to the northeast. Ursa Major is now in the northwest. Boötes is high up in the west. Virgo is to the west, with Libra southwest and Scorpius south. Sagittarius and Capricorn are southeast. Cygnus (containing the Northern Cross ) is to the east. Hercules is high in the sky along with Corona Borealis . January constellations include Pictor and Reticulum (near Hydrus and Mensa, respectively). In July, Ara (adjacent to Triangulum Australe) and Scorpius can be seen. Constellations near
19685-836: The same stars but different names. Biblical scholar E. W. Bullinger interpreted some of the creatures mentioned in the books of Ezekiel and Revelation as the middle signs of the four-quarters of the Zodiac, with the Lion as Leo , the Bull as Taurus , the Man representing Aquarius , and the Eagle standing in for Scorpio . The biblical Book of Job also makes reference to a number of constellations, including עיש ‘Ayish "bier", כסיל chesil "fool" and כימה chimah "heap" (Job 9:9, 38:31–32), rendered as "Arcturus, Orion and Pleiades" by
19840-401: The sky next to his lyre ( Lyra ); and a man named Cygnus (Greek for swan ) was transformed into his namesake. Later Romans also associated this constellation with the tragic story of Phaethon , the son of Helios the sun god, who demanded to ride his father's sun chariot for a day. Phaethon, however, was unable to control the reins, forcing Zeus to destroy the chariot (and Phaethon) with
19995-570: The sky, but they usually lie at a variety of distances away from the Earth. Since each star has its own independent motion, all constellations will change slowly over time. After tens to hundreds of thousands of years, familiar outlines will become unrecognizable. Astronomers can predict the past or future constellation outlines by measuring common proper motions of individual stars by accurate astrometry and their radial velocities by astronomical spectroscopy . The 88 constellations recognized by
20150-564: The sky. Today they now follow officially accepted designated lines of right ascension and declination based on those defined by Benjamin Gould in epoch 1875.0 in his star catalogue Uranometria Argentina . The 1603 star atlas " Uranometria " of Johann Bayer assigned stars to individual constellations and formalized the division by assigning a series of Greek and Latin letters to the stars within each constellation. These are known today as Bayer designations . Subsequent star atlases led to
20305-438: The solace it brings; while 2 describes a triumph of Tiberius. Poems 3–5 are to friends, 7 a request for correspondence, and 10 an autobiography. The final book of the Tristia with 14 poems focuses on his wife and friends. Poems 4, 5, 11, and 14 are addressed to his wife, 2 and 3 are prayers to Augustus and Bacchus , 4 and 6 are to friends, 8 to an enemy. Poem 13 asks for letters, while 1 and 12 are apologies to his readers for
20460-521: The song of the Muses , which describes the rape of Proserpina . The sixth book is a collection of stories about the rivalry between gods and mortals, beginning with Arachne and ending with Philomela . The seventh book focuses on Medea , as well as Cephalus and Procris . The eighth book focuses on Daedalus ' flight, the Calydonian boar hunt, and the contrast between pious Baucis and Philemon and
20615-536: The southern hemisphere of the sky based on the knowledge of Western star charts; with this improvement, the Chinese Sky was integrated with the World astronomy. Historically, the origins of the constellations of the northern and southern skies are distinctly different. Most northern constellations date to antiquity, with names based mostly on Classical Greek legends. Evidence of these constellations has survived in
20770-595: The southern sky, which did not depict the traditional stars recorded by ancient Chinese astronomers. Further improvements were made during the later part of the Ming dynasty by Xu Guangqi and Johann Adam Schall von Bell , the German Jesuit and was recorded in Chongzhen Lishu (Calendrical Treatise of Chongzhen period , 1628). Traditional Chinese star maps incorporated 23 new constellations with 125 stars of
20925-412: The star 4 Cygni (HD 183056): an approximately fan-shaped glowing region of several arcminutes' diameter, to the south and west of the fifth-magnitude star. It was first discovered visually near San Jose, California and publicly reported by amateur astronomer Stephen Waldee in 2007, and was confirmed photographically by Al Howard in 2010. California amateur astronomer Dana Patchick also says he detected it on
21080-577: The star, the nebula appears to fade away. Less than one degree from the Blinking Planetary is the double star 16 Cygni. The North America Nebula (NGC 7000) is one of the most well-known nebulae in Cygnus, because it is visible to the unaided eye under dark skies, as a bright patch in the Milky Way. However, its characteristic shape is only visible in long-exposure photographs – it is difficult to observe in telescopes because of its low surface brightness . It has low surface brightness because it
21235-485: The stars of this association, NML Cygni , is one of the largest stars currently known . The constellation is also home to Cygnus X-1 , a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole . Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, an area around Cygnus. Most of
21390-471: The state of his health (10), his hopes, memories, and yearning for Rome (3, 6, 8), and his needs in exile (3). Book 2 contains impassioned requests to Germanicus (1 and 5) and various friends to speak on his behalf at Rome while he describes his despair and life in exile. Book 3 has nine poems in which Ovid addresses his wife (1) and various friends. It includes a telling of the story of Iphigenia in Tauris (2),
21545-493: The surviving version, redacted to three books according to an epigram prefixed to the first book, is thought to have been published c. 8 –3 BC. Between the publications of the two editions of the Amores can be dated the premiere of his tragedy Medea , which was admired in antiquity but is no longer extant. Ovid's next poem, the Medicamina Faciei (a fragmentary work on women's beauty treatments), preceded
21700-479: The system was found to be emitting muons , likely caused by neutrinos . While the compact object is thought to be a neutron star or possibly a black hole, it is possible that the object is instead a more exotic stellar remnant, possibly the first discovered quark star , hypothesized due to its production of cosmic rays that cannot be explained if the object is a normal neutron star. The system also emits cosmic rays and gamma rays , and has helped shed insight on to
21855-522: The unaided eye under dark skies. It is loose, with about 30 stars arranged over a wide area; their conformation appears triangular. The brightest stars of M39 are of the 7th magnitude. Another open cluster in Cygnus is NGC 6910 , also called the Rocking Horse Cluster, possessing 16 stars with a diameter of 5 arcminutes visible in a small amateur instrument; it is of magnitude 7.4. The brightest of these are two gold-hued stars, which represent
22010-441: The various poems, several describe events in the relationship, thus presenting the reader with some vignettes and a loose narrative. Book 1 contains 15 poems. The first tells of Ovid's intention to write epic poetry, which is thwarted when Cupid steals a metrical foot from him, changing his work into love elegy. Poem 4 is didactic and describes principles that Ovid would develop in the Ars Amatoria . The fifth poem, describing
22165-427: The wealth of antiquarian material it preserves, it recently has been seen as one of Ovid's finest literary works and a unique contribution to Roman elegiac poetry. The Ibis is an elegiac poem in 644 lines, in which Ovid uses a dazzling array of mythic stories to curse and attack an enemy who is harming him in exile. At the beginning of the poem, Ovid claims that his poetry up to that point had been harmless, but now he
22320-425: The wicked Erysichthon . The ninth book focuses on Heracles and the incestuous Byblis . The tenth book focuses on stories of doomed love, such as Orpheus , who sings about Hyacinthus , as well as Pygmalion , Myrrha , and Adonis . The eleventh book compares the marriage of Peleus and Thetis with the love of Ceyx and Alcyone . The twelfth book moves from myth to history describing the exploits of Achilles ,
22475-409: The year due to night on Earth occurring at gradually different portions of its orbit around the Sun. As Earth rotates toward the east, the celestial sphere appears to rotate west, with stars circling counterclockwise around the northern pole star and clockwise around the southern pole star. Because of Earth's 23.5° axial tilt , the zodiac is distributed equally across hemispheres (along
22630-451: The years and centuries to come. The constellations have no official symbols, though those of the ecliptic may take the signs of the zodiac. Symbols for the other modern constellations, as well as older ones that still occur in modern nomenclature, have occasionally been published. The Great Rift, a series of dark patches in the Milky Way, is most visible in the southern sky. Some cultures have discerned shapes in these patches. Members of
22785-464: The zodiac and 36 more (now 38, following the division of Argo Navis into three constellations) are listed by Ptolemy , a Greco-Roman astronomer from Alexandria , Egypt, in his Almagest . The formation of constellations was the subject of extensive mythology , most notably in the Metamorphoses of the Latin poet Ovid . Constellations in the far southern sky were added from the 15th century until
22940-406: Was a Roman poet who lived during the reign of Augustus . He was a younger contemporary of Virgil and Horace , with whom he is often ranked as one of the three canonical poets of Latin literature . The Imperial scholar Quintilian considered him the last of the Latin love elegists . Although Ovid enjoyed enormous popularity during his lifetime, the emperor Augustus exiled him to Tomis ,
23095-505: Was already known by Virgil , by Herodotus and by Ovid himself in his Metamorphoses . Most scholars, however, oppose these hypotheses. One of the main arguments of these scholars is that Ovid would not let his Fasti remain unfinished, mainly because this poem meant his consecration as an imperial poet. Ovid died at Tomis in AD 17 or 18. It is thought that the Fasti , which he spent time revising, were published posthumously. The Heroides ("Heroines") or Epistulae Heroidum are
23250-467: Was attached to the Quadrantid meteor shower), but is now divided between Boötes and Draco . A list of 88 constellations was produced for the IAU in 1922. It is roughly based on the traditional Greek constellations listed by Ptolemy in his Almagest in the 2nd century and Aratus ' work Phenomena , with early modern modifications and additions (most importantly introducing constellations covering
23405-534: Was banished to Tomis , on the Black Sea , by the exclusive intervention of the Emperor Augustus without any participation of the Senate or of any Roman judge . This event shaped all his following poetry. Ovid wrote that the reason for his exile was carmen et error – "a poem and a mistake", claiming that his crime was worse than murder, more harmful than poetry. The Emperor's grandchildren, Julia
23560-568: Was connected in some way to the influential gens Fabia and helped him during his exile in Tomis (now Constanța in Romania). Ovid spent the first 25 years of his literary career primarily writing poetry in elegiac meter with erotic themes. The chronology of these early works is not secure, but scholars have established tentative dates. His earliest extant work is thought to be the Heroides , letters of mythological heroines to their absent lovers, which may have been published in 19 BC, although
23715-498: Was finally published in 1930. Where possible, these modern constellations usually share the names of their Graeco-Roman predecessors, such as Orion, Leo, or Scorpius. The aim of this system is area-mapping, i.e. the division of the celestial sphere into contiguous fields. Out of the 88 modern constellations, 36 lie predominantly in the northern sky, and the other 52 predominantly in the southern. The boundaries developed by Delporte used data that originated back to epoch B1875.0 , which
23870-688: Was preserved as part of the Dunhuang Manuscripts . Native Chinese astronomy flourished during the Song dynasty , and during the Yuan dynasty became increasingly influenced by medieval Islamic astronomy (see Treatise on Astrology of the Kaiyuan Era ). As maps were prepared during this period on more scientific lines, they were considered as more reliable. A well-known map from the Song period
24025-406: Was when Benjamin A. Gould first made his proposal to designate boundaries for the celestial sphere, a suggestion on which Delporte based his work. The consequence of this early date is that because of the precession of the equinoxes , the borders on a modern star map, such as epoch J2000 , are already somewhat skewed and no longer perfectly vertical or horizontal. This effect will increase over
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