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The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.
The mirror has a polished area of 26.3 m 2 (283 sq ft), of which 0.9 m 2 (9.7 sq ft) is obscured by the secondary support struts, [16] giving a total collecting area of 25.4 m 2 (273 sq ft). This is over six times larger than the collecting area of Hubble's 2.4 m (7.9 ft) diameter mirror, which has a collecting area of 4.0 m 2 (43 sq
The 15th anniversary, in 2005, was celebrated with a collection of images of M51 (the Whirlpool Galaxy), and also with a section of the Eagle nebula. [2] The 15th anniversary included a collection of other content including, in multiple languages, the video release, Hubble — 15 Years of Discovery. [3]
The second mission in the Polaris Program will launch via a Falcon 9 Block 5 vehicle with a Crew Dragon capsule. SpaceX and Polaris had studied a crewed mission to lift the Hubble Space Telescope into a higher orbit to prevent it from burning up in the atmosphere, [4] [5] but this option was rejected by NASA in June 2024. [6]
Congress eventually approved funding of US$36 million for 1978, and the design of the LST began in earnest, aiming for a launch date of 1983. During the early 1980s, the telescope was named after Edwin Hubble. Hubble was originally intended to be retrieved and returned to Earth by the Space Shuttle, but the
SpaceX’s Starship rocket system is on the launchpad once again, preparing for its second test flight after a fiery explosion ended its first attempt in April.
October 2018: planned launch date as of 2016. [3] Early 2019: planned launch date as of October 2017. [41] May 2020 or later: planned launch date as of March 2018. [42] 30 March 2021: planned launch date as of June 2018. [33] 31 October 2021: planned launch date as of July 2020. [34] November 2021 or later: planned launch date as of June 2021. [35]
[5] [24] A NASA history of the Hubble, [25] in discussing the reasons for switching from a 3-meter main mirror to a 2.4-meter (94 in) design, states: "In addition, changing to a 2.4-meter mirror would lessen fabrication costs by using manufacturing technologies developed for military spy satellites". Different versions of the KH-11 vary in mass.