🎵🎵🎵100+ Hubble Space Telescope Photos Ultra HD (4K) Relax Music ❤️1 Hour Slideshow
The Hubble Space Telescope (HST) is a space
telescope that was launched into low Earth orbit in
1990, and remains in operation. Although not the first
space telescope, Hubble is one of the largest and
most versatile, and is well known as both a vital
research tool and a public relations boon for
astronomy. The HST is named after the astronomer
Edwin Hubble, and is one of NASA's Great
Observatories, along with the Compton Gamma Ray
Observatory, the Chandra X-ray Observatory, and the
Spitzer Space Telescope.
With a 2.4-meter (7.9 ft) mirror, Hubble's four main
instruments observe in the near ultraviolet, visible, and
near infrared spectra. Hubble's orbit outside the
distortion of Earth's atmosphere allows it to take
extremely high-resolution images, with substantially
lower background light than ground-based
telescopes. Hubble has recorded some of the most
detailed visible light images ever, allowing a deep view
into space and time. Many Hubble observations have
led to breakthroughs in astrophysics, such as
accurately determining the rate of expansion of the universe. The HST was built by the United States space agency NASA, with contributions from the European Space Agency. The Space Telescope Science Institute
(STScI) selects Hubble's targets and processes the
resulting data, while the Goddard Space Flight Center
controls the spacecraft.
Space telescopes were proposed as early as 1923. Hubble was funded in the 1970s, with a proposed launch in 1983, but the project was beset by technical delays, budget problems, and the Challenger disaster (1986). When finally launched in 1990, Hubble's main mirror was found to have been ground incorrectly, compromising the telescope's capabilities. The optics were corrected to their intended quality by a servicing
mission in 1993.
Hubble is the only telescope designed to be serviced in space by astronauts. After launch by Space Shuttle Discovery in 1990, four subsequent Space Shuttle missions repaired, upgraded, and replaced systems on the telescope. A fifth mission was canceled on safety grounds following the Columbia disaster (2003).
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