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139-764: Virgin Galactic Holdings, Inc. is a British-American spaceflight company founded by Richard Branson and the Virgin Group conglomerate which retains an 11.9% stake through Virgin Investments Limited. It is headquartered in California , and operates from New Mexico . The company develops commercial spacecraft and provides suborbital spaceflights to space tourists . Virgin Galactic's suborbital spacecraft are air launched from beneath

278-573: A Boeing 747-400 aircraft, renamed Cosmic Girl , which was acquired from Virgin Atlantic . This was spun off into Virgin Orbit with the LauncherOne business in 2017. Virgin Galactic plans to have generation 2 motherships ready for 2025, for the next-generation Delta-class spaceplanes. In July 2022, Virgin announced it would partner with Boeing's Aurora Flight Sciences to design and build

417-435: A formation . The generic term "small satellite" or "smallsat" is also sometimes used, as is "satlet". Examples: Astrid-1 and Astrid-2, as well as the set of satellites currently announced for LauncherOne (below) In 2018, the two Mars Cube One microsats—massing just 13.5 kg (30 lb) each—became the first CubeSats to leave Earth orbit for use in interplanetary space. They flew on their way to Mars alongside

556-421: A spaceport (cosmodrome), which may be equipped with launch complexes and launch pads for vertical rocket launches and runways for takeoff and landing of carrier airplanes and winged spacecraft. Spaceports are situated well away from human habitation for noise and safety reasons. ICBMs have various special launching facilities. A launch is often restricted to certain launch windows . These windows depend upon

695-496: A sub-orbital spaceflight the spacecraft reaches space and then returns to the atmosphere after following a (primarily) ballistic trajectory. This is usually because of insufficient specific orbital energy , in which case a suborbital flight will last only a few minutes, but it is also possible for an object with enough energy for an orbit to have a trajectory that intersects the Earth's atmosphere, sometimes after many hours. Pioneer 1

834-512: A "time buffer" and substantially widened the allowable launch windows . The parking orbit gave the crew and controllers time to thoroughly check out the spacecraft after the stresses of launch before committing it for a long journey to the Moon. Robotic missions do not require an abort capability and require radiation minimalization only for delicate electronics, and because modern launchers routinely meet "instantaneous" launch windows, space probes to

973-464: A 10 kg (22 lb) payload into a 250 km (160 mi) orbit to an even-more-capable clustered "20/450 Nano/Micro Satellite Launch Vehicle" (NMSLV) capable of delivering 20 kg (44 lb) payloads into 450 km (280 mi) circular orbits . The Boeing Small Launch Vehicle is an air-launched three-stage-to-orbit launch vehicle concept aimed to launch small payloads of 45 kg (100 lb) into low Earth orbit. The program

1112-717: A backlash from those who had booked flights with Virgin Galactic, with the company having received $ 80 million in fares and deposits. Tom Bower , author of Branson: The Man behind the Mask , told the Sunday Times : "They spent 10 years trying to perfect one engine and failed. They are now trying to use a different engine and get into space in six months. It's just not feasible." BBC science editor David Shukman commented in October 2014, that "[Branson's] enthusiasm and determination [are] undoubted. But his most recent promises of launching

1251-535: A base in New Mexico before extending operations around the globe. Built from lightweight carbon-composite materials and powered by a hybrid rocket motor, SS2 was based on the Ansari X Prize -winning SpaceShipOne concept – a rocket plane that was lifted initially by a carrier aircraft before independent launch. SS1 became the world's first private spaceship with a series of high-altitude flights in 2004. The programme

1390-442: A base layer, the space suit and footwear. It was said that the base layer would enhance performance and blood flow during the high and zero G portions of flight and the liner of the spacesuit was made of new fabrics such as Tencel Luxe, SpinIt and Nomex, used for temperature control and moisture management. David Mackay , former RAF test pilot , was named chief pilot for Virgin Galactic in 2011 and chief test-pilot. Steve Isakowitz

1529-463: A carrier airplane known as White Knight Two . Virgin Galactic's maiden spaceflight occurred in 2018 with its VSS Unity spaceship. Branson had originally hoped to see a maiden spaceflight by 2010, but the date was delayed, primarily due to the October 2014 crash of VSS Enterprise . The company did the early work on the satellite launch development of LauncherOne before this was hived off to

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1668-443: A counter measure to United States bomber planes in the 1950s. The Tsiolkovsky-influenced Sergey Korolev became the chief rocket designer, and derivatives of his R-7 Semyorka missiles were used to launch the world's first artificial Earth satellite , Sputnik 1 , on October 4, 1957. The U.S., after the launch of Sputnik and two embarrassing failures of Vanguard rockets , launched Explorer 1 on February 1, 1958. Three years later,

1807-449: A fail-safe system that could have guarded against such premature deployment. "A single-point human failure has to be anticipated," board member Robert Sumwalt said. Instead, Scaled Composites "put all their eggs in the basket of the pilots doing it correctly." NTSB Chairman Christopher Hart emphasized that consideration of human factors, which was not emphasized in the design, safety assessment, and operation of SpaceShipTwo's feather system,

1946-416: A flight that normally lasts over twenty hours , could be traversed in less than one hour. While no company offers this type of transportation today, SpaceX has revealed plans to do so as early as the 2020s using Starship . Suborbital spaceflight over an intercontinental distance requires a vehicle velocity that is only a little lower than the velocity required to reach low Earth orbit. If rockets are used,

2085-552: A flight, initially at a ticket price of $ 200,000 per person, but raised to $ 250,000 in May 2013. Tickets were available from more than 140 "space agents" worldwide. SpaceShipTwo was designed to fly to a height of 110 km, going beyond the defined boundary of space (100 km) and lengthening the experience of weightlessness for its passengers. The spacecraft would reach a top speed of 4000 km/h (2485 mph). On 23 May 2014, Virgin Galactic announced that they had abandoned use of

2224-426: A formalized crew resource management (CRM) approach, already used by Virgin for its WK2 operations, was being adopted for SS2. However, despite CRM issues being cited as a likely contributing cause, Virgin confirmed that it would not modify the cockpit display system. While Virgin had been pursuing the development of a smallsat launch vehicle since 2012, the company began in 2015 to make the smallsat launch business

2363-399: A fuel explosion. Telemetry data and cockpit video showed that instead, the air braking system appeared to have deployed incorrectly and too early, for unknown reasons, and that the craft had violently broken apart in mid-air seconds later. U.S. National Transportation Safety Board Chairman Christopher Hart said on 2 November 2014 that investigators had determined SpaceShipTwo's tail system

2502-524: A further US$ 110 million to develop a program to launch small satellites into low Earth orbit , raising their equity share to 37.8%. Virgin announced in June 2014 that they were in talks with Google about the injection of capital to fund both development and operations. The New Mexico government has invested approximately $ 200m (£121m) in the Spaceport America facility, for which Virgin Galactic

2641-435: A larger "mother" satellite for communication with ground controllers or for launching and docking with picosatellites. Picosatellites are emerging as a new alternative for do-it-yourself kitbuilders. Picosatellites are currently commercially available across the full range of 0.1–1 kg (0.22–2.2 lb). Launch opportunities are now available for $ 12,000 to $ 18,000 for sub-1 kg picosat payloads that are approximately

2780-637: A larger part of Virgin's core business plan, as the Virgin human spaceflight program had experienced multiple delays. This part of the business was spun off into a new company called Virgin Orbit in 2017. Following the crash of VSS Enterprise , the replacement SpaceShipTwo named VSS Unity was rolled out on 19 February 2016. Test flights were set to begin after ground tests completed in August 2016. VSS Unity completed its first flight (first free flight; captive carry flights had taken place since September 2016),

2919-451: A launch tower and flame trench. It is surrounded by equipment used to erect, fuel, and maintain launch vehicles. Before launch, the rocket can weigh hundreds of tons. The Space Shuttle Columbia , on STS-1 , weighed 2030 metric tons (4,480,000 lb) at takeoff. The most commonly used definition of outer space is everything beyond the Kármán line , which is 100 kilometers (62 mi) above

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3058-544: A liquid-fueled rocket on March 16, 1926. During World War II , the first guided rocket, the V-2 , was developed and employed as a weapon by Nazi Germany . During a test flight in June 1944, one such rocket reached space at an altitude of 189 kilometers (102 nautical miles), becoming the first human-made object to reach space. At the end of World War II, most of the V-2 rocket team, including its head, Wernher von Braun , surrendered to

3197-425: A market value estimated at US$ 7.4 billion . By mid-2015, many more launch options had become available for smallsats, and rides as secondary payloads had become both greater in quantity and easier to schedule on shorter notice. In a surprising turn of events, the U.S. Department of Defense , which had for decades procured heavy satellites on decade-long procurement cycles, is making a transition to smallsats in

3336-433: A mass of no more than 1.33 kilograms (2.9 lb) per unit. The CubeSat concept was first developed in 1999 by a collaborative team of California Polytechnic State University and Stanford University , and the specifications, for use by anyone planning to launch a CubeSat-style nanosatellite, are maintained by this group. With continued advances in the miniaturization and capability increase of electronic technology and

3475-554: A multimillion-dollar donation from entrepreneurs Anousheh Ansari and Amir Ansari . The prize was won on October 4, 2004, the 47th anniversary of the Sputnik 1 launch, by the Tier One project designed by Burt Rutan and financed by Microsoft co-founder Paul Allen , using the experimental spaceplane SpaceShipOne . $ 10 million was awarded to the winner, and more than $ 100 million was invested in new technologies in pursuit of

3614-474: A number of companies began development of launch vehicles specifically targeted at the smallsat market. In particular, with larger numbers of smallsats flying, the secondary payload paradigm does not provide the specificity required for many small satellites that have unique orbital and launch-timing requirements. Some USA-based private companies that at some point in time have launched smallsat launch vehicles commercially: The term "microsatellite" or "microsat"

3753-521: A partnership with Under Armour for the fabrication of space suits for passengers and pilots of SpaceShipTwo . Under Armour would also create uniforms for Virgin Galactic employees working at Spaceport America. The full range known as the UA | VG (Under Armour | Virgin Galactic) built with UA's new Intelliknit fabric was revealed later, ahead of Richard Branson's inaugural commercial flight. This range included

3892-611: A pre-programmed list of operations that will be executed unless otherwise instructed. A robotic spacecraft for scientific measurements is often called a space probe or space observatory . Many space missions are more suited to telerobotic rather than crewed operation, due to lower cost and risk factors. In addition, some planetary destinations such as Venus or the vicinity of Jupiter are too hostile for human survival, given current technology. Outer planets such as Saturn , Uranus , and Neptune are too distant to reach with current crewed spaceflight technology, so telerobotic probes are

4031-484: A prerequisite to identifying and mitigating new hazards." In its submission to the NTSB, Virgin Galactic reported that the second SS2, at the time nearing completion, had been modified with an automatic mechanical inhibit device to prevent locking or unlocking of the feather during safety-critical phases. An explicit warning about the dangers of premature unlocking had also been added to the checklist and operating handbook, and

4170-512: A separate company, Virgin Orbit , in 2017. The company also has aspirations for suborbital transport, to provide rocket-powered, point-to-point 3,000 mph (4,800 km/h) air travel. The spin-off company, Virgin Orbit was shut down in May 2023. On 13 December 2018, VSS Unity achieved the project's first suborbital space flight, VSS Unity VP-03 , with two pilots, reaching an altitude of 82.7 kilometres (51.4 mi), and officially entering outer space by U.S. standards. In February 2019,

4309-522: A speed of 1,100 mph for 20 seconds; while this was an improvement, it fell far short of the 2,500 mph for 70 seconds required to carry six passengers into space. However, Branson still announced his spaceship would be capable of "launching 100 satellites every day." In addition to the suborbital passenger business, Virgin Galactic intended to market SpaceShipTwo for suborbital space science missions and market White Knight Two for "small satellite" launch services. It had planned to initiate RFPs for

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4448-457: A successful glide test, in December 2016. The glide lasted ten minutes. By January 2018, seven glide tests had been completed, and on 5 April 2018 it performed a powered test flight, the first since 2014. By July 2018, Unity had gone considerably higher and faster in its testing program than had its predecessor. On 13 December 2018, VSS Unity reached a height of 82.7 km (51.4 miles) above

4587-474: A surge in the number of Covid-19 cases in New Mexico, Virgin Galactic had to postpone a key test flight of its spacecraft in November 2020, and then in December 2020, a computer connection issue prevented engine ignition. On 22 May 2021, VSS Unity flew its sixth powered test flight reaching an altitude of 89 km [55 mi]. This suborbital flight marked the first ever human space flight from New Mexico; it

4726-681: Is designed to form a quantum communication network as well as communicate with Earth through an optical ground station. The term "small satellite", or sometimes "minisatellite", often refers to an artificial satellite with a wet mass (including fuel) between 100 and 500 kg (220 and 1,100 lb), but in other usage has come to mean any satellite under 500 kg (1,100 lb). Small satellite examples include Demeter , Essaim , Parasol , Picard , MICROSCOPE , TARANIS , ELISA , SSOT , SMART-1 , Spirale-A and -B , and Starlink satellites. Although smallsats have traditionally been launched as secondary payloads on larger launch vehicles,

4865-491: Is done by a set of orbital maneuvers called space rendezvous . After rendezvousing with the space station, the space vehicle then docks or berths with the station. Docking refers to joining of two separate free-flying space vehicles, while berthing refers to mating operations where an inactive vehicle is placed into the mating interface of another space vehicle by using a robotic arm . Vehicles in orbit have large amounts of kinetic energy. This energy must be discarded if

5004-887: Is effective mainly because of its ability to sustain thrust even as the atmosphere thins. Many ways to reach space other than rocket engines have been proposed. Ideas such as the space elevator , and momentum exchange tethers like rotovators or skyhooks require new materials much stronger than any currently known. Electromagnetic launchers such as launch loops might be feasible with current technology. Other ideas include rocket-assisted aircraft/spaceplanes such as Reaction Engines Skylon (currently in early stage development), scramjet powered spaceplanes, and RBCC powered spaceplanes. Gun launch has been proposed for cargo. On some missions beyond LEO (Low Earth Orbit) , spacecraft are inserted into parking orbits, or lower intermediary orbits. The parking orbit approach greatly simplified Apollo mission planning in several important ways. It acted as

5143-586: Is impossible. To date several academics have studied intergalactic travel in a serious manner. Spacecraft are vehicles designed to operate in space. The first 'true spacecraft' is sometimes said to be Apollo Lunar Module , since this was the only crewed vehicle to have been designed for, and operated only in space; and is notable for its non-aerodynamic shape. Spacecraft today predominantly use rockets for propulsion , but other propulsion techniques such as ion drives are becoming more common, particularly for uncrewed vehicles, and this can significantly reduce

5282-541: Is known as Kessler syndrome . There are several terms that refer to a flight into or through outer space . A space mission refers to a spaceflight intended to achieve an objective. Objectives for space missions may include space exploration , space research , and national firsts in spaceflight. Space transport is the use of spacecraft to transport people or cargo into or through outer space. This may include human spaceflight and cargo spacecraft flight. The first theoretical proposal of space travel using rockets

5421-647: Is more fuel-efficient for a craft to burn its fuel as close as possible to its periapsis (lowest point); see Oberth effect . Astrodynamics is the study of spacecraft trajectories, particularly as they relate to gravitational and propulsion effects. Astrodynamics allows for a spacecraft to arrive at its destination at the correct time without excessive propellant use. An orbital maneuvering system may be needed to maintain or change orbits. Non-rocket orbital propulsion methods include solar sails , magnetic sails , plasma-bubble magnetic systems , and using gravitational slingshot effects. The term "transfer energy" means

5560-455: Is not generally recognized by the public that the increase in potential energy required to pass the Kármán line is only about 3% of the orbital energy (potential plus kinetic energy) required by the lowest possible Earth orbit (a circular orbit just above the Kármán line.) In other words, it is far easier to reach space than to stay there. On May 17, 2004, Civilian Space eXploration Team launched

5699-517: Is proposed to drive down launch costs for U.S. military small satellites to as low as US$ 300,000 per launch ($ 7,000/kg) and, if the development program was funded, as of 2012 could be operational by 2020. The Swiss company Swiss Space Systems (S3) has announced plans in 2013 to develop a suborbital spaceplane named SOAR that would launch a microsat launch vehicle capable of putting a payload of up to 250 kg (550 lb) into low Earth orbit. The Spanish company PLD Space born in 2011 with

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5838-484: Is the anchor tenant; other commercial space companies also use the site. On Monday 28 October 2019, Virgin Galactic listed into the New York Stock Exchange, trading under the ticker symbol 'SPCE', the first publicly traded space tourism company (i.e., company whose primary business is space tourism). The company raised $ 450 million through a SPAC merger listing, and company's market value after listing

5977-650: Is the fifth spacecraft put on an escape trajectory leaving the Solar System . Voyager 1 , Voyager 2 , Pioneer 10 , Pioneer 11 are the earlier ones. The one farthest from the Sun is Voyager 1 , which is more than 100 AU distant and is moving at 3.6 AU per year. In comparison, Proxima Centauri , the closest star other than the Sun, is 267,000 AU distant. It will take Voyager 1 over 74,000 years to reach this distance. Vehicle designs using other techniques, such as nuclear pulse propulsion are likely to be able to reach

6116-695: Is the opportunity to enable missions that a larger satellite could not accomplish, such as: The nanosatellite and microsatellite segments of the satellite launch industry have been growing rapidly in the 2010s. Development activity in the 1–50 kg (2.2–110.2 lb) range has been significantly exceeding that in the 50–100 kg (110–220 lb) range. In the 1–50 kg range alone, fewer than 15 satellites were launched annually in 2000 to 2005, 34 in 2006, then fewer than 30 launches annually during 2007 to 2011. This rose to 34 launched in 2012 and 92 launched in 2013. European analyst Euroconsult projects more than 500 smallsats being launched in 2015–2019 with

6255-478: Is to reduce the cost; heavier satellites require larger rockets with greater thrust that also have greater cost to finance. In contrast, smaller and lighter satellites require smaller and cheaper launch vehicles and can sometimes be launched in multiples. They can also be launched 'piggyback', using excess capacity on larger launch vehicles. Miniaturized satellites allow for cheaper designs and ease of mass production. Another major reason for developing small satellites

6394-422: Is usually applied to the name of an artificial satellite with a wet mass between 10 and 100 kg (22 and 220 lb). However, this is not an official convention and sometimes those terms can refer to satellites larger than that, or smaller than that (e.g., 1–50 kg (2.2–110.2 lb)). Sometimes, designs or proposed designs from some satellites of these types have microsatellites working together or in

6533-539: The OneWeb satellite constellation providing world Internet access service of WorldVu . Virgin Galactic would take a share of the launch contracts to launch the satellites into their 1,200 km (750 mi) orbits. The prospective launches were to use the LauncherOne system. In 2017 the LauncherOne business was spun off into Virgin Orbit , which ceased operations in 2023 following bankruptcy. Virgin Galactic and

6672-486: The PicoSAT series of microsatellites) is usually applied to artificial satellites with a wet mass between 0.1 and 1 kg (0.22 and 2.2 lb), although it is sometimes used to refer to any satellite that is under 1 kg in launch mass. Again, designs and proposed designs of these types usually have multiple picosatellites working together or in formation (sometimes the term "swarm" is applied). Some designs require

6811-484: The Tsiolkovsky rocket equation , can be used to find the total Δ v {\displaystyle \Delta v} , or potential change in velocity. This formula, which is still used by engineers, is a key concept of spaceflight. Spaceflight became a practical possibility with the work of Robert H. Goddard 's publication in 1919 of his paper A Method of Reaching Extreme Altitudes . His application of

6950-461: The USSR made one orbit around the Earth. In official Soviet documents, there is no mention of the fact that Gagarin parachuted the final seven miles. As of 2020, the only spacecraft regularly used for human spaceflight are Soyuz , Shenzhou , and Crew Dragon . The U.S. Space Shuttle fleet operated from April 1981 until July 2011. SpaceShipOne has conducted three human suborbital space flights. On

7089-808: The Virgin Group and the Virgin Atlantic airline, and who had a long personal history of balloon and surface record-breaking activities. As part of Branson's promotion of the firm, he has added a variation of the Virgin Galactic livery to his personal business jet, the Dassault Falcon 900EX "Galactic girl" (G-GALX). The Spaceship Company (TSC) was founded by Richard Branson through Virgin Group (which owned 70%) and Burt Rutan through Scaled Composites (which owned 30%) to build commercial spaceships and launch aircraft for space travel. From

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7228-418: The X Prize Foundation offered a US$ 10,000,000 prize for the first non-government organization to launch a reusable crewed spacecraft into space twice within two weeks. It was modeled after early 20th-century aviation prizes, and aimed to spur development of low-cost spaceflight. Created in May 1996 and initially called just the "X Prize", it was renamed the "Ansari X Prize" on May 6, 2004 following

7367-457: The de Laval nozzle to liquid-fuel rockets improved efficiency enough for interplanetary travel to become possible. After further research, Goddard attempted to secure an Army contract for a rocket-propelled weapon in the first World War but his plans were foiled by the November 11, 1918 armistice with Germany . After choosing to work with private financial support, he was the first to launch

7506-606: The 2020s. The office of space acquisition and integration said in January 2023 that "the era of massive satellites needs to be in the rear view mirror for the Department of Defense" with small satellites being procured for DoD needs in all orbital regimes, regardless of "whether it's LEO MEO or GEO " while aiming for procurements in under three years. The smaller satellites are deemed to be harder for an enemy to target, as well as providing more resilience through redundancy in

7645-472: The DARPA SeeMe program that intended to release a " constellation of 24 micro-satellites (~20 kg (44 lb) range) each with 1-m imaging resolution ." The program was cancelled in December 2015. In April 2013, Garvey Spacecraft was awarded a US$ 200,000 contract to evolve their Prospector 18 suborbital launch vehicle technology into an orbital nanosat launch vehicle capable of delivering

7784-559: The Earth at speeds close to three times the speed of sound. The two pilots, Mark "Forger" Stucky and Frederick "CJ" Sturckow earned commercial astronaut wings from the US government for the accomplishment. Another flight in February 2019 carried third crew member (1 in the passenger cabin) for the first time. After transfer to Spaceport America in New Mexico in February 2020, a couple of 15 km altitude test flights were carried out. Due to

7923-403: The Earth's surface. (The United States defines outer space as everything beyond 50 miles (80 km) in altitude.) Rocket engines remain the only currently practical means of reaching space, with planes and high-altitude balloons failing due to lack of atmosphere and alternatives such as space elevators not yet being built. Chemical propulsion, or the acceleration of gases at high velocities,

8062-697: The Gemini program ended just before the Apollo 1 tragedy. Following multiple uncrewed test flights of the Saturn 1B and the Saturn V , the U.S. launched the crewed Apollo 7 mission into low earth orbit . Shortly after its successful completion, the U.S. launched Apollo 8 (first mission to orbit the moon), Apollo 9 (first Apollo mission to launch with both the CSM and the LEM ) and Apollo 10 (first mission to nearly land on

8201-459: The GoFast rocket on a suborbital flight, the first amateur spaceflight. On June 21, 2004, SpaceShipOne was used for the first privately funded human spaceflight . Point-to-point, or Earth to Earth transportation, is a category of sub-orbital spaceflight in which a spacecraft provides rapid transport between two terrestrial locations. A conventional airline route between London and Sydney ,

8340-457: The ISS external platform Materials International Space Station Experiment (MISSE-8) for testing. In April 2014, the nanosatellite KickSat was launched aboard a Falcon 9 rocket with the intention of releasing 104 femtosatellite-sized chipsats, or "Sprites". In the event, they were unable to complete the deployment on time due to a failure of an onboard clock and the deployment mechanism reentered

8479-834: The Mojave spaceport while testing components of the rocket motor for SpaceShipTwo . An explosion occurred during a cold fire test, which involved nitrous oxide flowing through fuel injectors. The procedure had been expected to be safe. Just a year later, in July 2008, Richard Branson predicted the maiden space voyage would take place within 18 months. In October 2009, Virgin Galactic announced that initial flights would take place from Spaceport America "within two years." Later that year, Scaled Composites announced that White Knight Two's first SpaceShipTwo captive flights would be in early 2010. Both aircraft did fly together in March 2010. The credibility of

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8618-539: The Moon and developed continuous crewed human presence in space with a series of space stations , ranging from the Salyut program to the International Space Station . Rockets are the only means currently capable of reaching orbit or beyond. Other non-rocket spacelaunch technologies have yet to be built, or remain short of orbital speeds. A rocket launch for a spaceflight usually starts from

8757-423: The Moon and other planets generally use direct injection to maximize performance by limiting the boil off of cryogenic propellants . Although some might coast briefly during the launch sequence, they do not complete one or more full parking orbits before the burn that injects them onto an Earth escape trajectory. The escape velocity from a celestial body decreases as the distance from the body increases. However, it

8896-482: The Sierra Nevada Corporation (SNC) nitrous-oxide-rubber motor for SpaceShipTwo; on 24 July 2014, SNC confirmed that they had also abandoned use of this motor for their Dream Chaser space shuttle. Future testing was to see SpaceShipTwo powered by a polyamide grain powered motor. As of July 2021 the maximum height reached has been 89.9 km. In honor of the science-fiction series Star Trek ,

9035-514: The USA on the 20th anniversary of Yuri Gagarin 's flight, on 12 April 1981. During the Shuttle era, six orbiters were built, all of which flown in the atmosphere and five of which flown in space. The Enterprise was used only for approach and landing tests, launching from the back of a Boeing 747 and gliding to deadstick landings at Edwards AFB, California . The first Space Shuttle to fly into space

9174-537: The USSR launched Vostok 1, carrying cosmonaut Yuri Gagarin into orbit. The US responded with the suborbital launch of Alan Shepard on May 5, 1961, and the orbital launch of John Glenn on February 20, 1962. These events were followed by a pledge from U.S. President John F. Kennedy to go to the moon and the creation of the Gemini and Apollo programs. After successfully performing a rendezvous and docking and an EVA ,

9313-644: The United States, and were expatriated to work on American missiles at what became the Army Ballistic Missile Agency , producing missiles such as Juno I and Atlas . The Soviet Union , in turn, captured several V2 production facilities and built several replicas, with 5 of their 11 rockets successfully reaching their targets. (This was relatively consistent with Nazi Germany's success rate.) The Soviet Union developed intercontinental ballistic missiles to carry nuclear weapons as

9452-585: The Virgin Group collaborated with Boom Technology in order to create a new supersonic passenger transporter as a successor to the Concorde . This new supersonic plane would fly at Mach 2.2 (similar to Concorde) for a 3-hour trans-Atlantic flight (half of standard), projected to cost $ 2,500–10,000 per seat (half of Concorde) for a load of 45 passengers (the Concorde held 100). It was anticipated that with

9591-552: The White Knight Two mothership carrying SpaceShipTwo until the touchdown of the spacecraft after the suborbital flight would be about 2.5 hours. The suborbital flight itself would be only a small fraction of that time, with weightlessness lasting approximately 6 minutes. Passengers were to be able to release themselves from their seats during these six minutes and float around the cabin. In July 2007, three Scaled Composites employees were killed and three critically injured at

9730-432: The ability to deorbit themselves. This becomes a major issue when large numbers of uncontrollable spacecraft exist in frequently used orbits, increasing the risk of debris colliding with functional satellites. This problem is exacerbated when large objects, often upper stages, break up in orbit or collide with other objects, creating often hundreds of small, hard to find pieces of debris. This problem of continuous collisions

9869-904: The accumulation of knowledge since the design of Concorde, the new plane would be safer and cheaper with better fuel economy, operating costs, and aerodynamics. Boom would collaborate with Virgin's The Spaceship Company for design, engineering, and flight-test support, and manufacturing. The initial model would be the Boom Technology XB-1 "Baby Boom" Supersonic Demonstrator 1/3-size prototype. It would be capable of trans-Pacific flight, LA-to-Sydney in 6.75 hours, traveling at 2,335 km/h (1,451 mph). XB-1 would be equipped with General Electric J85 engines, Honeywell avionics, with composite structures fabricated by Blue Force using TenCate Advanced Composites carbon fibre products. Virgin Galactic had optioned 10 units. These options expired in 2020. On 24 January 2019, Virgin Galactic announced

10008-927: The atmosphere and burned up. Small satellites usually require innovative propulsion, attitude control , communication and computation systems. Larger satellites usually use monopropellants or bipropellant combustion systems for propulsion and attitude control; these systems are complex and require a minimal amount of volume to surface area to dissipate heat. These systems may be used on larger small satellites, while other micro/nanosats have to use electric propulsion, compressed gas, vaporizable liquids such as butane or carbon dioxide or other innovative propulsion systems that are simple, cheap and scalable. Small satellites can use conventional radio systems in UHF, VHF, S-band and X-band, although often miniaturized using more up-to-date technology as compared to larger satellites. Tiny satellites such as nanosats and small microsats may lack

10147-608: The atmosphere on 14 May 2014, without having deployed any of the 5-gram femtosats. ThumbSat is another project intending to launch femtosatellites in the late 2010s. ThumbSat announced a launch agreement with CubeCat in 2017 to launch up to 1000 of the very small satellites. In March 2019, the CubeSat KickSat-2 deployed 105 femtosats called "ChipSats" into Earth orbit. Each of the ChipSats weighed 4 grams. The satellites were tested for 3 days, and they then reentered

10286-405: The blast and the company was fined for breaches of health and safety rules. The cause of the accident has never been made public. The successor to SS1, SS2 was twice as large, measuring 18 m (60 ft) in length; whereas SpaceShipOne could carry a single pilot and two passengers, SS2 was planned to have a crew of two and room for six passengers. By August 2013, 640 customers had signed up for

10425-547: The co-pilot, who died in the accident, prematurely unlocked a movable tail section some ten seconds after SpaceShip Two fired its rocket engine and was breaking the sound barrier, resulting in the craft's breaking apart. But the Board also found that the Scaled Composites unit of Northrop Grumman, which designed and flew the prototype space tourism vehicle, did not properly prepare for potential human slip-ups by providing

10564-458: The company from the disaster by referring to the test pilots as Scaled Composites employees. Virgin Galactic's official statement on 31 October 2014 said: "Virgin Galactic's partner Scaled Composites conducted a powered test flight of SpaceShipTwo earlier today. [...] Local authorities have confirmed that one of the two Scaled Composites pilots died during the accident". This was in strong contrast to public communications previously released concerning

10703-518: The design of LauncherOne". Virgin Orbit has been working on the LauncherOne concept since late 2008, and as of 2015 , is making it a larger part of Virgin's core business plan as the Virgin human spaceflight program has experienced multiple delays and a fatal accident in 2014. In December 2012, DARPA announced that the Airborne Launch Assist Space Access program would provide the microsatellite rocket booster for

10842-670: The design of a large distributed network of satellite assets . In 2021, the first autonomous nanosatellites , part of the Adelis-SAMSON mission, designed and developed by the Technion and Rafael in Israel were launched into space. In 2023, SpaceX launched a 20cm quantum communication nano satellite developed by the Tel Aviv University , it is the world's first quantum communication satellite. TAU's nanosatellite

10981-422: The earlier promises of launch dates by Virgin Galactic were brought into question in October 2014 by its chief executive, George T. Whitesides , when he told The Guardian : "We've changed dramatically as a company. When I joined in 2010 we were mostly a marketing organisation. Right now we can design, build, test, and fly a rocket motor all by ourselves and all in Mojave, which I don't think is done anywhere else on

11120-428: The emergence of the technological advances of miniaturization and increased capital to support private spaceflight initiatives in the 2010s, several startups have been formed to pursue opportunities with developing a variety of small-payload Nanosatellite Launch Vehicle (NLV) technologies. NLVs proposed or under development include: Actual NS launches: The term "picosatellite" or "picosat" (not to be confused with

11259-494: The end of the year", adding after a pause, "It's always 'the end of the year' ". In February 2014, cracks in WhiteKnightTwo, where the spars connect with the fuselage, were discovered during an inspection conducted after Virgin Galactic took possession of the aircraft from builder Scaled Composites. In September 2014, Richard Branson described the intended date for the first commercial flight as February or March 2015; by

11398-486: The first passenger trip by the end of this year had already started to look unrealistic some months ago." At 10:51 PST 31 October 2014, the fourth rocket-powered test flight of the company's first SpaceShipTwo craft, VSS Enterprise , ended in disaster, as it broke apart in mid-air, with the debris falling into the Mojave desert in California, shortly after being released from the mothership. Initial reports attributed

11537-509: The first ship was named after the fictional starship Enterprise . To reenter the atmosphere, SpaceShipTwo folded its wings and then returned them to their original position for an unpowered descent flight back onto the runway. The craft had a very limited cross-range capability, and until other planned spaceports would be built worldwide, it had to land in the area where it started. Further spaceports were planned in Abu Dhabi and elsewhere, with

11676-509: The flights of SpaceShipOne were from the Mojave Airport Civilian Flight Test Center . Flights were numbered, starting with flight 01 on May 20, 2003. One or two letters are appended to the number to indicate the type of mission. An appended C indicates that the flight was a captive carry, G indicates an unpowered glide, and P indicates a powered flight. If the actual flight differs in category from

11815-440: The group's successful flights, which had routinely presented pilots, craft, and projects within the same organizational structures, as being "Virgin Galactic" flights or activities of "the Galactic team". The BBC's David Shukman commented that: "Even as details emerge of what went wrong, this is clearly a massive setback to a company hoping to pioneer a new industry of space tourism. Confidence is everything and this will not encourage

11954-455: The intended flight, two letters are appended: the first indicating the intended mission and the second the mission actually performed. Sources: In February 2007, Virgin announced that they had signed a memorandum of understanding with NASA to explore the potential for collaboration, but this produced only a relatively small contract in 2011 of up to $ 4.5 million for research flights. Virgin Group in January 2015 announced an investment into

12093-468: The intention that the spaceline would have a worldwide availability and commodity in the future. There was a series of delays to the SS2 flight test vehicle becoming operational, amidst repeated assurances from Virgin Galactic marketing that operational flights were only a year or two out. The Wall Street Journal reported in November 2014 that there has been "tension between Mr. Branson's upbeat projections and

12232-462: The large economic cost of launch vehicles and the costs associated with construction. Miniature satellites, especially in large numbers, may be more useful than fewer, larger ones for some purposes – for example, gathering of scientific data and radio relay . Technical challenges in the construction of small satellites may include the lack of sufficient power storage or of room for a propulsion system . One rationale for miniaturizing satellites

12371-509: The last of which took place in September 2011. A rocket-powered test flight of SpaceShipTwo took place on 29 April 2013, with an engine burn of 16 seconds duration. The brief flight began at an altitude of 47,000 feet and reached a maximum altitude of 55,000 feet. While the SS2 achieved a speed of Mach 1.2 (920 mph), this was less than half the 2,000 mph speed predicted by Richard Branson. SpaceShipTwo's second supersonic flight achieved

12510-403: The launches of Earth observation and telecommunications satellites, interplanetary missions , the rendezvouses and dockings with space stations , and crewed spaceflights on scientific or tourist missions. Spaceflight can be achieved conventionally via multistage rockets , which provide the thrust to overcome the force of gravity and propel spacecraft onto suborbital trajectories . If

12649-459: The long list of celebrity and millionaire customers waiting for their first flight". At a hearing in Washington D.C. on 28 July 2015, and a press release on the same day the NTSB cited inadequate design safeguards, poor pilot training, lack of rigorous FAA oversight and a potentially anxious co-pilot without recent flight experience as important factors in the 2014 crash. They determined that

12788-427: The loss to an unidentified "in-flight anomaly". The flight was the first test of SpaceShipTwo with new plastic-based fuel, replacing the original—a rubber-based solid fuel that had not met expectations. 39-year-old co-pilot Michael Alsbury was killed and 43-year-old pilot Peter Siebold was seriously injured. Initial investigations found that the engine and propellant tanks were intact, showing that there had not been

12927-554: The mission is orbital , the spacecraft usually separates the first stage and ignites the second stage , which propels the spacecraft to high enough speeds that it reaches orbit. Once in orbit, spacecraft are at high enough speeds that they fall around the Earth rather than fall back to the surface. Most spacecraft, and all crewed spacecraft, are designed to deorbit themselves or, in the case of uncrewed spacecraft in high-energy orbits, to boost themselves into graveyard orbits . Used upper stages or failed spacecraft, however, often lack

13066-409: The moon). These events culminated with the first crewed moon landing, Apollo 11 , and six subsequent missions, five of which successfully landed on the moon. Spaceflight has been widely employed by numerous government and commercial entities for placing satellites into orbit around Earth for a broad range of purposes. Certain government agencies have also sent uncrewed spacecraft exploring space beyond

13205-406: The nearest star significantly faster. Another possibility that could allow for human interstellar spaceflight is to make use of time dilation , as this would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. However, attaining such high speeds would still require

13344-484: The next generation of mothership. Boeing ended work on the contract in 2023 and has now filed suit against Virgin Galactic over unpaid bills according to a report in SpaceNews. Richard Branson unveiled the rocket plane on 7 December 2009, announcing that, after testing, the plane would carry fare-paying passengers ticketed for short duration journeys just above the atmosphere . Virgin Group would initially launch from

13483-482: The objective of developing low cost launch vehicles called Miura 1 and Miura 5 with the capacity to place up to 150 kg (330 lb) into orbit. The term "nanosatellite" or "nanosat" is applied to an artificial satellite with a wet mass between 1 and 10 kg (2.2 and 22.0 lb). Designs and proposed designs of these types may be launched individually, or they may have multiple nanosatellites working together or in formation, in which case, sometimes

13622-402: The only way to explore them. Telerobotics also allows exploration of regions that are vulnerable to contamination by Earth micro-organisms since spacecraft can be sterilized. Humans can not be sterilized in the same way as a spaceship, as they coexist with numerous micro-organisms, and these micro-organisms are also hard to contain within a spaceship or spacesuit. The first uncrewed space mission

13761-528: The persistent hurdles that challenged the company's hundreds of technical experts." The company responded that "the company and its contractors 'have internal milestones, such as schedule estimates and goals, but the companies are driven by safety and the completion of the flight test program before moving into commercial service.' Virgin Galactic's schedules have always been consistent with internal schedules of its contractors and changes have 'never impacted flight safety'." Spaceflight Spaceflights include

13900-608: The planet". On 7 December 2009, SpaceShipTwo was unveiled at the Mojave Spaceport . Branson told the 300 people attending, each of whom had booked rides at $ 200,000 each, that flights would begin "in 2011." However, in April 2011, Branson announced further delays, saying "I hope 18 months from now, we'll be sitting in our spaceship and heading off into space." By February 2012, SpaceShipTwo had completed 15 test flights attached to White Knight Two and an additional 16 glide tests,

14039-399: The position of celestial bodies and orbits relative to the launch site. The biggest influence is often the rotation of the Earth. Once launched, orbits are normally located within relatively constant flat planes at a fixed angle to the axis of the Earth, and the Earth rotates within this orbit. A launch pad is a fixed structure designed to dispatch airborne vehicles. It generally consists of

14178-514: The power supply or mass for large conventional radio transponders , and various miniaturized or innovative communications systems have been proposed, such as laser receivers, antenna arrays and satellite-to-satellite communication networks. Few of these have been demonstrated in practice. Electronics need to be rigorously tested and modified to be "space hardened" or resistant to the outer space environment (vacuum, microgravity, thermal extremes, and radiation exposure). Miniaturized satellites allow for

14317-402: The prize. The spacecraft initially called SpaceShipTwo was planned to achieve a suborbital journey with a short period of weightlessness. Carried to about 16 kilometers, or 52,000 ft, underneath a carrier aircraft, White Knight Two , after separation the vehicle was to continue to over 100 km (the Kármán line , a common definition of where "space" begins). The time from liftoff of

14456-459: The project carried three people, including a passenger, on VSS Unity VF-01 , with a member of the team floating within the cabin during a spaceflight that reached 89.9 kilometres (55.9 mi). On 11 July 2021, founder Richard Branson and three other employees rode on VSS Unity 22 as passengers, marking the first time a spaceflight company founder has travelled on his own ship into outer space. In February 2022, Virgin Galactic announced that it

14595-464: The remainder heats the atmosphere. The Mercury , Gemini , and Apollo capsules splashed down in the sea. These capsules were designed to land at relatively low speeds with the help of a parachute. Soviet/Russian capsules for Soyuz make use of a big parachute and braking rockets to touch down on land. Spaceplanes like the Space Shuttle land like a glider . After a successful landing,

14734-487: The remaining 30% of The Spaceship Company. After a claimed investment by Virgin Group of US$ 100 million , in 2010 the sovereign wealth fund of Abu Dhabi , Aabar Investments group, acquired a 31.8% stake in Virgin Galactic for US$ 280 million , receiving exclusive regional rights to launch tourism and scientific research space flights from the United Arab Emirates capital. In July 2011, Aabar invested

14873-934: The same mission cost, with significantly increased revisit times: every area of the globe can be imaged every 3.5 hours rather than the once per 24 hours with the RapidEye constellation. More rapid revisit times are a significant improvement for nations performing disaster response, which was the purpose of the RapidEye constellation. Additionally, the nanosat option would allow more nations to own their own satellite for off-peak (non-disaster) imaging data collection. As costs lower and production times shorten, nanosatellites are becoming increasingly feasible ventures for companies. Example nanosatellites: ExoCube (CP-10) , ArduSat , SPROUT Nanosatellite developers and manufacturers include EnduroSat , GomSpace , NanoAvionics , NanoSpace, Spire , Surrey Satellite Technology , NovaWurks , Dauria Aerospace , Planet Labs and Reaktor . In

15012-527: The satellite business in early 2010, but flights had not materialized as of 2014. On 14 May 2013, Richard Branson stated on Virgin Radio Dubai's Kris Fade Morning Show that he would be aboard the first public flight of SpaceShipTwo, which had again been rescheduled, this time to December 25, 2013. "Maybe I'll dress up as Father Christmas", Branson said. The third rocket-powered test flight of SpaceShipTwo took place on 10 January 2014 and successfully tested

15151-690: The secondary payload paradigm does not provide the specificity required for many increasingly sophisticated small satellites that have unique orbital and launch-timing requirements. In July 2012, Virgin Orbit announced LauncherOne , an orbital launch vehicle designed to launch "smallsat" primary payloads of 100 kg (220 lb) into low Earth orbit , with launches projected to begin in 2016. Several commercial customers have already contracted for launches, including GeoOptics , Skybox Imaging , Spaceflight Industries , and Planetary Resources . Both Surrey Satellite Technology and Sierra Nevada Space Systems are developing satellite buses "optimized to

15290-482: The size of a soda can. The term "femtosatellite" or "femtosat" is usually applied to artificial satellites with a wet mass below 100 g (3.5 oz). Like picosatellites, some designs require a larger "mother" satellite for communication with ground controllers. Three prototype "chip satellites" were launched to the ISS on Space Shuttle Endeavour on its final mission in May 2011. They were attached to

15429-463: The size of the rocket relative to the payload is similar to an Intercontinental Ballistic Missile (ICBM). Any intercontinental spaceflight has to surmount problems of heating during atmospheric re-entry that are nearly as large as those faced by orbital spaceflight. A minimal orbital spaceflight requires much higher velocities than a minimal sub-orbital flight, and so it is technologically much more challenging to achieve. To achieve orbital spaceflight,

15568-445: The spacecraft SpaceShipTwo and the uncrewed launch vehicle LauncherOne (LauncherOne never launched from underneath a White Knight Two). The mothership is a large fixed-wing aircraft with two hulls linked together by a central wing. Two aircraft were planned – VMS Eve and VMS Spirit of Steve Fossett . On May 22, 2021 Mothership Eve was used to carry VSS Unity to a launch altitude of 44,000 feet. The LauncherOne system used

15707-640: The spacecraft, its occupants, and cargo can be recovered. In some cases, recovery has occurred before landing: while a spacecraft is still descending on its parachute, it can be snagged by a specially designed aircraft. This mid-air retrieval technique was used to recover the film canisters from the Corona spy satellites. Uncrewed spacecraft or robotic spacecraft are spacecraft without people on board. Uncrewed spacecraft may have varying levels of autonomy from human input, such as remote control , or remote guidance. They may also be autonomous , in which they have

15846-562: The spaceship's Reaction Control System (RCS) and the newly installed thermal protection coating on the vehicle's tail booms. Virgin Galactic CEO George Whitesides said "We are progressively closer to our target of starting commercial service in 2014". Interviewed by The Observer at the time of her 90th birthday in July 2014, Branson's mother, Eve, told reporter Elizabeth Day of her intention of going to space herself. Asked when that might be, she replied: "I think it's

15985-557: The successful Mars InSight lander mission. The two microsats accomplished a flyby of Mars in November 2018, and both continued communicating with ground stations on Earth through late December. Both went silent by early January 2019. A number of commercial and military-contractor companies are currently developing microsatellite launch vehicles to perform the increasingly targeted launch requirements of microsatellites. While microsatellites have been carried to space for many years as secondary payloads aboard larger launchers ,

16124-610: The tangential velocity around the Earth is as important as altitude. In order to perform a stable and lasting flight in space, the spacecraft must reach the minimal orbital speed required for a closed orbit . Interplanetary spaceflight is flight between planets within a single planetary system . In practice, the use of the term is confined to travel between the planets of our Solar System . Plans for future crewed interplanetary spaceflight missions often include final vehicle assembly in Earth orbit, such as NASA's Constellation program and Russia's Kliper / Parom tandem. New Horizons

16263-564: The ten years of nanosat launches prior to 2014, only 75 nanosats were launched. Launch rates picked up substantially when in the three-month period from November 2013–January 2014 94 nanosats were launched. One challenge of using nanosats has been the economic delivery of such small satellites to anywhere beyond low Earth orbit . By late 2014, proposals were being developed for larger spacecraft specifically designed to deliver swarms of nanosats to trajectories that are beyond Earth orbit for applications such as exploring distant asteroids. With

16402-417: The term "satellite swarm" or " fractionated spacecraft " may be applied. Some designs require a larger "mother" satellite for communication with ground controllers or for launching and docking with nanosatellites. Over 2300 nanosatellites have been launched as of December 2023. A CubeSat is a common type of nanosatellite, built in cube form based on multiples of 10 cm × 10 cm × 10 cm, with

16541-425: The time of TSC's formation in 2005, the launch customer was Virgin Galactic, which contracted to purchase five SpaceShipTwos and two WhiteKnightTwos. Scaled Composites was contracted to develop and build the initial prototypes of WhiteKnightTwo and SpaceShipTwo, and then TSC began production of the follow-on vehicles beginning in 2008. In 2012, after Northrop Grumman acquired Scaled Composites, Virgin Galactic acquired

16680-491: The time of this announcement, a new plastic-based fuel had yet to be ignited in-flight. By September 2014, the three test flights of the SS2 had only reached an altitude of around 71,000 ft, approximately 13 miles; in order to receive a Federal Aviation Administration licence to carry passengers, the craft needs to complete test missions at full speed and 62-mile height . Following the announcement of further delays, UK newspaper The Sunday Times reported that Branson faced

16819-411: The total amount of energy imparted by a rocket stage to its payload. This can be the energy imparted by a first stage of a launch vehicle to an upper stage plus payload, or by an upper stage or spacecraft kick motor to a spacecraft . In order to reach a space station , a spacecraft would have to arrive at the same orbit and approach to a very close distance (e.g. within visual contact). This

16958-414: The use of satellite constellations , nanosatellites are increasingly capable of performing commercial missions that previously required microsatellites. For example, a 6U CubeSat standard has been proposed to enable a satellite constellation of thirty five 8 kg (18 lb) Earth-imaging satellites to replace a constellation of five 156 kg (344 lb) RapidEye Earth-imaging satellites, at

17097-460: The use of some new, advanced method of propulsion . Dynamic soaring as a way to travel across interstellar space has been proposed as well. Intergalactic travel involves spaceflight between galaxies, and is considered much more technologically demanding than even interstellar travel and, by current engineering terms, is considered science fiction . However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel

17236-413: The vehicle is to land safely without vaporizing in the atmosphere. Typically this process requires special methods to protect against aerodynamic heating . The theory behind reentry was developed by Harry Julian Allen . Based on this theory, reentry vehicles present blunt shapes to the atmosphere for reentry. Blunt shapes mean that less than 1% of the kinetic energy ends up as heat reaching the vehicle, and

17375-460: The vehicle's mass and increase its delta-v . Launch systems are used to carry a payload from Earth's surface into outer space. Most current spaceflight uses multi-stage expendable launch systems to reach space. The first reusable spacecraft, the X-15 , was air-launched on a suborbital trajectory on 19 July 1963. The first partially reusable orbital spacecraft, the Space Shuttle , was launched by

17514-453: Was Sputnik , launched October 4, 1957 to orbit the Earth. Nearly all satellites , landers and rovers are robotic spacecraft. Not every uncrewed spacecraft is a robotic spacecraft; for example, a reflector ball is a non-robotic uncrewed spacecraft. Space missions where other animals but no humans are on-board are called uncrewed missions. The first human spaceflight was Vostok 1 on April 12, 1961, on which cosmonaut Yuri Gagarin of

17653-480: Was NASA's first space probe intended to reach the Moon. A partial failure caused it to instead follow a suborbital trajectory to an altitude of 113,854 kilometers (70,746 mi) before reentering the Earth's atmosphere 43 hours after launch. The most generally recognized boundary of space is the Kármán line 100 km (62 mi) above sea level. (NASA alternatively defines an astronaut as someone who has flown more than 80 km (50 mi) above sea level.) It

17792-399: Was appointed as Virgin Galactic's president in June 2013. In October 2016, Mike Moses replaced Steve Isakowitz as president; Isakowitz moved to Aerospace Corp. to become president and CEO; Moses was promoted from VP Operations, and was once a NASA flight director and shuttle integration manager. The White Knight Two is a special aeroplane built as the mothership and launch-platform for

17931-414: Was critical to safe human spaceflight to mitigate the potential consequences of human error. "Manned commercial spaceflight is a new frontier, with many unknown risks and hazards. In such an environment, safety margins around known hazards must be rigorously established and, where possible, expanded. For commercial spaceflight to successfully mature, we must meticulously seek out and mitigate known hazards, as

18070-406: Was delayed after three Scaled Composites employees – Todd Ivens, Eric Blackwell and Charles May – were killed in an accident in Mojave on 26 July 2007, where the detonation of a tank of nitrous oxide destroyed a test stand. They had been observing the test from behind a chain-link fence that offered no protection from the shrapnel and debris when the tank exploded. Three other employees were injured in

18209-664: Was initially claimed to be successful but it was later revealed Unity briefly stepped outside the airspace that had been reserved for it and the FAA were not informed as required. The FAA grounded Virgin Galactic's space planes before allowing a resumption of flights after some changes to procedures including reserving a larger volume of airspace. On 14 October 2021, Virgin Galactic announced that an upgrade program for Unity and Eve would begin, delaying future commercial flights to mid 2022. This followed material analysis that required further analysis. The first Spaceship III, VSS Imagine ,

18348-408: Was more than $ 2.4 billion. At the time, the company claimed to have over 600 customer reservations representing approximately $ 80 million in total collected deposits and more than $ 120 million in "potential revenue". After its listing, SPCE was a popular stock for many retail investors and was often mentioned on the subreddit r/wallstreetbets . The Ansari X Prize was a space competition in which

18487-442: Was opening ticket sales to the public. The price of a reservation was $ 450,000. In June 2023, Virgin Galactic launched its first commercial space tourism flight called Galactic 01 . Galactic 07 in June 2024 was the final flight of Unity as the company shifted focus to its Delta class vehicles and a higher launch cadence. Virgin Galactic was founded in 2004 by British entrepreneur Sir Richard Branson , who had previously founded

18626-493: Was piloted by CJ Sturkow (pilot-in-command) and Dave MacKay. The VSS Unity was carried to 44,000 feet by the jet powered launch aircraft Mothership Eve , where it was released to reach its suborbital altitude over New Mexico. A fully crewed test flight took place on 11 July 2021 with two pilots Dave Mackay and Michael Masucci and the four passengers were Richard Branson, Beth Moses, Colin Bennett and Sirisha Bandla . The flight

18765-663: Was published by Scottish astronomer and mathematician William Leitch , in an 1861 essay "A Journey Through Space". More well-known is Konstantin Tsiolkovsky 's work, " Исследование мировых пространств реактивными приборами " ( The Exploration of Cosmic Space by Means of Reaction Devices ), published in 1903. In his work, Tsiolkovsky describes the fundamental rocket equation: Δ v = v e ln ⁡ m 0 m f {\displaystyle \Delta v=v_{e}\ln {\frac {m_{0}}{m_{f}}}} Where: This equation, known as

18904-496: Was rolled out on 30 March 2021 and it was indicated there is ground testing to do before glide test flights should commence not earlier than Summer 2021. On 17 December 2003—on the 100th anniversary of the Wright brothers first powered flight of an aircraft — SpaceShipOne , piloted by Brian Binnie on Flight 11P , made its first rocket-powered flight and became the first privately built craft to achieve supersonic flight. All of

19043-436: Was supposed to have been released for deployment as the craft was traveling about 1.4 times the speed of sound; instead, the tail section began pivoting when the vehicle was flying at Mach 1. "I'm not stating that this is the cause of the mishap. We have months and months of investigation to determine what the cause was." Asked if pilot error was a possible factor, Hart said: "We are looking at all of these issues to determine what

19182-752: Was the Columbia , followed by the Challenger , Discovery , Atlantis , and Endeavour . The Endeavour was built to replace the Challenger , which was lost in January 1986. The Columbia broke up during reentry in February 2003. Smallsat A small satellite , miniaturized satellite , or smallsat is a satellite of low mass and size, usually under 1,200 kg (2,600 lb). While all such satellites can be referred to as "small", different classifications are used to categorize them based on mass . Satellites can be built small to reduce

19321-423: Was the root cause of this mishap." He noted that it was also unclear how the tail mechanism began to rotate once it was unlocked, since that maneuver requires a separate pilot command that was never given, and whether the craft's position in the air and its speed somehow enabled the tail section to swing free on its own. In November 2014, Branson and Virgin Galactic came under criticism for their attempts to distance

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