An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis , called polar axis , parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras . The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any celestial object with diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal drive or clock drive . Equatorial mounts achieve this by aligning their rotational axis with the Earth, a process known as polar alignment .
34-536: Science Centre Singapore , previously known as the Singapore Science Centre , is a scientific museum in Jurong East , Singapore, specialising in the promotion of scientific and technological education for the general public. It houses over 850 exhibits over eight exhibition galleries and receives over a million visitors every year. In 2003, it celebrated its silver jubilee . The Science Centre
68-420: A "wedge". Many mid-size professional telescopes also have equatorial forks , these are usually in range of 0.5-2.0 meter diameter. The English mount or Yoke mount has a frame or " yoke " with right ascension axis bearings at the top and the bottom ends, and a telescope attached inside the midpoint of the yoke allowing it to swing on the declination axis. The telescope is usually fitted entirely inside
102-534: A contract for the design of the new Science Centre. At the time, the project was expected to be completed by 2025. The Science Centre commented that the team, which includes Zaha Hadid architects, submitted the "best proposal which reflected the boldness of scientific endeavour and future focused Stem aspirations". On 2 December 2022, the Science Centre and the Ministry of Education jointly announced that
136-476: A control "paddle" or supplied through an adjacent laptop computer which is also used to capture images from an electronic camera. The electronics of modern telescope systems often include a port for autoguiding. A special instrument tracks a star and makes adjustment in the telescope's position while photographing the sky. To do so the autoguider must be able to issue commands through the telescope's control system. These commands can compensate for very slight errors in
170-480: A fixed object in the sky. Also, for astrophotography , the image does not rotate in the focal plane , as occurs with altazimuth mounts when they are guided to track the target's motion, unless a rotating erector prism or other field-derotator is installed. Equatorial telescope mounts come in many designs. In the last twenty years motorized tracking has increasingly been supplemented with computerized object location. There are two main types. Digital setting circles take
204-528: A new Science Centre would be opened in the Jurong Lake District in 2027, which is set to be the 50th anniversary of the Science Centre. According to the joint press release, the new Science Centre will be designed by Zaha Hadid Architects and Architects 21, and will consist of 5 interlocking rectangular buildings, each with large glass windows overlooking Jurong Lake . In 2023, the Science Centre held an exhibition featuring art pieces inspired by
238-421: A right ascension axis at its base. The telescope is attached to two pivot points at the other end of the fork so it can swing in declination. Most modern mass-produced catadioptric reflecting telescopes (200 mm or larger diameter) tend to be of this type. The mount resembles an Altazimuth mount , but with the azimuth axis tilted and lined up to match earth rotation axis with a piece of hardware usually called
272-418: A small computer with an object database that is attached to encoders. The computer monitors the telescope's position in the sky. The operator must push the telescope. Go-to systems use (in most cases) a worm and ring gear system driven by servo or stepper motors, and the operator need not touch the instrument at all to change its position in the sky. The computers in these systems are typically either hand-held in
306-401: Is important to note that stargazing through the observatory telescope is only possible when the sky is clear. However, regardless of weather conditions, the staff will be present. The Observatory hosted a viewing session for the 20 April 2023 solar eclipse from 11am to 1pm. It set up telescopes which were available for use, gratis, for anyone with a Science Centre admission ticket. The eclipse
340-467: Is land allocated for business activities. Consisting of Jurong Lake , Jurong Gateway, International Business Park and the southern section of Toh Guan, the Jurong Lake District is a prime regional centre serving as an commercial hub for business developments remote from the Central Area , to meet the various demands of businesses and provide employment opportunities closer to people staying in
374-557: Is paired with a second perpendicular axis of motion (known as the declination ). The equatorial axis of the mount is often equipped with a motorized " clock drive ", that rotates that axis one revolution every 23 hours and 56 minutes in exact sync with the apparent diurnal motion of the sky. They may also be equipped with setting circles to allow for the location of objects by their celestial coordinates . Equatorial mounts differ from mechanically simpler altazimuth mounts , which require variable speed motion around both axes to track
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#1732783557362408-580: Is under Jurong GRC and Southern section under West Coast GRC . After the electoral boundaries were redrawn for the 2011 Singaporean general election , a portion of the Jurong GRC was carved out to form the Yuhua SMC. There are 3 Primary schools and 4 Secondary schools in Jurong East. There are 3 tourist attractions in Jurong East – Jurong East is connected to the rest of Singapore with
442-451: The Jurong Lake District project. The development of Jurong started in the 1970s when estates such as Boon Lay , Taman Jurong , Bukit Batok , Bukit Gombak , Hong Kah , Teban Gardens and Yuhua were built, mostly due to the resettlement of Hong Kah (present-day Tengah ) and surrounding villages. Yuhua , Teban Gardens , Bukit Batok and Bukit Gombak formed Jurong East. There are 10 subzones in Jurong East. The Northern section
476-489: The Korean pop group BTS as well as props worn by the group's members. The exhibit, named "BTS x James Jean : Seven Phases Exhibition", ran from 16 December 2023 until 25 February 2024 at the Science Centre. The Science Centre Observatory is situated at 15.27 metres (50.1 ft) above mean sea level and is one of the few observatories in the world located next to the equator . Its unique position allows constellations in both
510-476: The Omni-Theatre . Costing $ 18 million, it has a 276-seat theatre underneath a 23-metre (75 ft) tilted dome. In 1999, a $ 38 million renovation expanded the centre's exhibition space with larger open areas, a direct connection to the separate Omni-Theatre building, as well as a new entrance. In 2000, Snow City , a recreation of a −5 °C (23 °F) environment in tropical Singapore, was set up beside
544-567: The Pan Island Expressway (PIE) and the Ayer Rajah Expressway (AYE). Jurong East is served by 2 MRT stations: Jurong East and Chinese Garden . Jurong East Bus Interchange started operations in 1985. It later moved to its first temporary site on 17 December 2011. All the bus services, except 51, 52, 105, 160, 197 & 506 were handed over to Tower Transit Singapore on 12 June 2016. On 6 December 2020,
578-484: The West Region of Singapore. Within the boundaries of Jurong Gateway and Toh Guan, there are 5 shopping malls and only 3 of the shopping malls is currently operational: The Town Centre of Jurong East is located at Jurong Regional Centre , presently known as Jurong Gateway subzone. Equatorial mount#English or Yoke mount In astronomical telescope mounts , the equatorial axis (the right ascension )
612-558: The Land Transport Authority(LTA) announced more inclusive public transport facilities with the opening of the new Jurong Town Hall Bus Interchange (JTHBI) on Sunday, 26 November 2023. Located along Venture Drive, JTHBI complements Jurong East MRT station and Jurong East Bus Interchange, and will provide added bus capacity to cater to future developments in the area. At Jurong Port , Jurong River , Penjuru Crescent , and parts of Toh Guan and Teban Gardens , there
646-620: The Omni-Theatre. On 7 December 2007, in its 30th anniversary year, the centre rebranded itself as the Science Centre Singapore (SCS). On 4 April 2008, the Urban Redevelopment Authority announced plans to relocate the Science Centre next to Chinese Garden MRT station within ten to 15 years. On 24 May 2019, the Science Centre board awarded a multi-disciplinary team led by Architects 61
680-601: The Science Centre Board, in which Raymond Woo architects' entry was selected. Built at a cost of S$ 12 million on a 60,000-square-metre (650,000 sq ft) site in Jurong East , it was officially opened on 10 December 1977 by Dr. Toh Chin Chye , the Minister-in-charge of the centre. In 1987, the centre saw a significant expansion with the opening of Singapore's first and only OMNIMAX theatre,
714-421: The face of LGBTQ+ activism so that Singapore can continue to thrive", had shared the event and requested that its subscribers "write in and express your concern to MOE and The Science Centre". Official website Jurong East West Coast GRC Yuhua SMC Jurong East is a planning area and residential town situated in the West Region of Singapore . It borders Jurong West and Boon Lay to
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#1732783557362748-561: The fork, although there are exceptions such as the Mount Wilson 2.5 m reflector , and there are no counterweights as with the German mount . The original English fork design is disadvantaged in that it does not allow the telescope to point too near the north or south celestial pole. The horseshoe mount overcomes the design disadvantage of English or Yoke mounts by replacing the polar bearing with an open "horseshoe" structure to allow
782-646: The former temporary bus interchange was relocated to facilitate the construction of the Jurong Region Line and the Jurong East Integrated Transport Hub. The new relocated interchange was located opposite the current interchange, along Jurong Gateway Road between the junctions of Jurong Gateway Road/Jurong East Street 12 and Jurong Gateway Road/Jurong East Central 1. All bus services with the exception of service 78, 79, CW3 and CW4 were relocated there. On 3 November 2023,
816-461: The northern and southern celestial hemispheres to be observed. The main telescope of the Observatory is a 40-centimetre (16 in) Cassegrain reflector of a combined focal length of 520 centimetres (200 in). The sub-telescope is a 15-centimetre (5.9 in) apochromatic Kepler refractor with a focal length of 180 centimetres (71 in). The equatorial mount for the telescopes
850-444: The other. An equatorial platform is a specially designed platform that allows any device sitting on it to track on an equatorial axis. It achieves this by having a surface that pivots about a "virtual polar axis". This gives equatorial tracking to anything sitting on the platform, from small cameras up to entire observatory buildings. These platforms are often used with altazimuth mounted amateur astronomical telescopes, such as
884-405: The professional level. At the amateur level, however, equatorial mounts remain popular, particularly for astrophotography. In the German equatorial mount , (sometimes called a " GEM " for short) the primary structure is a T -shape, where the lower bar is the right ascension axis (lower diagonal axis in image), and the upper bar is the declination axis (upper diagonal axis in image). The mount
918-417: The telescope to access Polaris and stars near it. The Hale Telescope is the most prominent example of a horseshoe mount in use. The Cross-axis or English cross axis mount is like a big "plus" sign ( + ). The right ascension axis is supported at both ends, and the declination axis is attached to it at approximately midpoint with the telescope on one end of the declination axis and a counter weight on
952-416: The tracking performance, such as periodic error caused by the worm drive that makes the telescope move. In new observatory designs, equatorial mounts have been out of favor for decades in large-scale professional applications. Massive new instruments are most stable when mounted in an alt-azimuth (up down, side-to-side) configuration. Computerized tracking and field-derotation are not difficult to implement at
986-462: The understanding of gender and sex in Singapore. On 1 June 2024, several hours after initially publicising the event on Facebook , the Science Centre announced that the event was cancelled and that all tickets would be refunded. According to news reports, a Telegram channel named "Protect Singapore", which described itself as "a channel for those who want to safeguard the future of Singapore in
1020-567: The west, Clementi to the east, Tengah and Bukit Batok to the north and Selat Jurong to the south. First developed in the 1970s, it is located approximately 15 km (9.3 miles) west of the Downtown Core district. Jurong East is the 7th most populated planning area in the West Region. Jurong East, along with the entire Jurong area in general, is envisioned to be the country's second central business district (CBD) as part of
1054-415: Was also livestreamed on the Science Centre's YouTube channel. The Science Centre organised a discussion titled "What is the difference between Gender and Sex?" to be held on 14 June 2024 at The Projector . Attendance at the event was limited to persons aged 18 years old and above. According to the synopsis, the discussion was intended to center around the psychological, social, and cultural factors shaping
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1088-546: Was carved out of the National Museum of Singapore as a separate institution so that the latter could focus on its artistic and historical collections. This idea was first mooted in 1969 by the former Science Council of Singapore, now known as the Agency for Science, Technology and Research (A*Star), and was approved by the government . The SCS building's design was decided by an architectural competition organised by
1122-568: Was designed for Singapore's unique location; the accompanying English yoke provides the stability needed for the drive and tracking mechanisms. The 5.5-metre (18 ft) stainless steel dome can be made to swivel in any direction and its shutter can be made to slide open for the telescope to be focused on to interesting objects in the sky. The Observatory has been open to the public for stargazing sessions every Friday night since June 2006. The opening hours are from 7:50 to 10:00 pm. The Observatory can comfortably accommodate 50 visitors per session. It
1156-534: Was developed by Joseph von Fraunhofer for the Great Dorpat Refractor that was finished in 1824. The telescope is placed on one end of the declination axis (top left in image), and a suitable counterweight on other end of it (bottom right). The right ascension axis has bearings below the T-joint, that is, it is not supported above the declination axis. The Open Fork mount has a Fork attached to
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