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  2. Hubble Space Telescope - Wikipedia

    en.wikipedia.org/wiki/Hubble_Space_Telescope

    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 .

  3. STS-31 - Wikipedia

    en.wikipedia.org/wiki/STS-31

    Hubble Space Telescope in the cargo bay of Discovery. STS-31 was launched on April 24, 1990 at 12:33:51 UTC (8:33:51 am EDT, local time at the launch site). A launch attempt on April 10, 1990, was scrubbed at T−4 minutes for a faulty valve in auxiliary power unit (APU) number one. The APU was eventually replaced, and the Hubble Space ...

  4. List of the most distant astronomical objects - Wikipedia

    en.wikipedia.org/wiki/List_of_the_most_distant...

    2.6 AU when Mars is diametrically opposed to Earth Kepler correctly characterized Mars and Earth's orbits in the publication Astronomia nova. It had been conjectured that the fixed stars were much farther away than the planets. Sun: Star 3rd century BC — 1609 380 Earth radii (very inaccurate, true=16000 Earth radii)

  5. Great Observatories program - Wikipedia

    en.wikipedia.org/wiki/Great_Observatories_program

    The Hubble Space Telescope (HST) primarily observes visible light and near-ultraviolet. It was launched in 1990 aboard the Space Shuttle Discovery during STS-31, but its main mirror had been ground incorrectly, resulting in spherical aberration that compromised the telescope's capabilities.

  6. Astronomical unit - Wikipedia

    en.wikipedia.org/wiki/Astronomical_unit

    Average distance from the Sun — Earth: 1.00 — Average distance of Earth's orbit from the Sun (sunlight travels for 8 minutes and 19 seconds before reaching Earth) — Mars: 1.52 — Average distance from the Sun — Jupiter: 5.2 — Average distance from the Sun — Light-hour: 7.2 — Distance light travels in one hour — Saturn: 9.5 ...

  7. STS-125 - Wikipedia

    en.wikipedia.org/wiki/STS-125

    STS-125, or HST-SM4 (Hubble Space Telescope Servicing Mission 4), was the fifth and final Space Shuttle mission to the Hubble Space Telescope (HST). The launch of the Space Shuttle Atlantis occurred on May 11, 2009, at 2:01 pm EDT. [2] [3] [4] Landing occurred on May 24 at 11:39 am EDT, [5] with the mission lasting a total of just under 13 days.

  8. STS-82 - Wikipedia

    en.wikipedia.org/wiki/STS-82

    STS-82 was the 22nd flight of the Space Shuttle Discovery and the 82nd mission of the Space Shuttle program.It was NASA's second mission to service the Hubble Space Telescope, during which Discovery's crew repaired and upgraded the telescope's scientific instruments, increasing its research capabilities.

  9. History of Mars observation - Wikipedia

    en.wikipedia.org/wiki/History_of_Mars_observation

    The Hubble Space Telescope (HST) has been used to perform systematic studies of Mars [91] and has taken the highest resolution images of Mars ever captured from Earth. [92] This telescope can produce useful images of the planet when it is at an angular distance of at least 50° from the Sun.