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1. • 19 tons (38,000 pounds)

     • SOFIA features a German-built far-infrared telescope with an effective diameter of 100-inches (2.5 meters). The telescope weighs 19 tons (38,000 pounds) and is mounted in the rear fuselage of a highly modified Boeing 747SP aircraft.
     www.nasa.gov/wp-content/uploads/2021/09/643708main_FS-096.pdf

     SOFIA - NASA's Stratospheric Observatory for Infrared Astronomy

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   How much does a SOFIA telescope weigh?

   • The telescope weighs 19 tons (38,000 pounds) and is mounted in the rear fuselage of a highly modified Boeing 747SP aircraft. Flying at altitudes of between 39,000 to 45,000 feet (12 – 14 kilometers) and above 99 percent of the water vapor in the atmosphere, SOFIA facilitates observations that are unobtainable from telescopes on the ground.

   SOFIA - NASA's Stratospheric Observatory for Infrared Astronomy

   www.nasa.gov/wp-content/uploads/2021/09/643708main_FS-096.pdf

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   What is a SOFIA telescope?

   • This telescope was designed for infrared astronomy observations in the stratosphere at altitudes of about 12 kilometres (41,000 ft). SOFIA's flight capability allowed it to rise above almost all of the water vapor in the Earth's atmosphere, which blocks some infrared wavelengths from reaching the ground.

   Stratospheric Observatory for Infrared Astronomy - Wikipedia

   en.wikipedia.org/wiki/Stratospheric_Observatory_for_Infrared_Astronomy

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   What is the Stratospheric Observatory for Infrared Astronomy (SOFIA)?

   • The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an airborne 2.5m (8.2 ft) telescope that conducts infrared observations from the back of a modified Boeing 747 Jumbo jet. It is a joint project of NASA and the German Aerospace Center to operate an infrared observatory above the water vapour in Earth’s atmosphere.

   SOFIA – Facts About NASA’s Flying Infrared Telescope

   www.spaceopedia.com/astronomy/telescopes/sofia/

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   What is a SOFIA telescope made of?

   • The SOFIA telescope's primary mirror was 2.5 meters in diameter and was manufactured of Zerodur, a glass-ceramic composite produced by Schott AG that has almost zero thermal expansion. REOSC, the optical department of the SAGEM Group in France, reduced the weight by milling honeycomb-shaped pockets out of the back.

   Stratospheric Observatory for Infrared Astronomy - Wikipedia

   en.wikipedia.org/wiki/Stratospheric_Observatory_for_Infrared_Astronomy

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   Why did Sofia need an infrared observatory?

   • As an infrared observatory, SOFIA needed to be able to view the sky unobstructed by Earth's atmosphere, which absorbs most of the infrared radiation coming from space.

   NASA's SOFIA observatory: the flying telescope | Space

   www.space.com/sofia-observatory.html

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   When was the first light collected by the SOFIA telescope?

   • "First light," the first time the telescope collected astronomical data, was achieved on May 25, 2010. Infrared light from the red supergiant star Antares, emitted more than 550 years ago, was observed by SOFIA using a camera called the Faint Object Infra-Red Camera for the SOFIA Telescope, or FORCAST, developed by Cornell University.

   SOFIA - NASA's Stratospheric Observatory for Infrared Astronomy

   www.nasa.gov/wp-content/uploads/2021/09/643708main_FS-096.pdf

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3. en.wikipedia.org › wiki › Stratospheric_ObservatoryStratospheric Observatory for Infrared Astronomy - Wikipedia

   en.wikipedia.org › wiki › Stratospheric_Observatory

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   SOFIA uses a 2.5 m (8.2 ft) reflector telescope, which has an oversized, 2.7 m (8.9 ft) diameter primary mirror, as was common with most large infrared telescopes. [ 3 ] The optical system uses a Cassegrain reflector design with a parabolic primary mirror and a remotely configurable hyperbolic secondary.

4. www.spaceopedia.com › astronomy › telescopesSOFIA – Facts About NASA’s Flying Infrared Telescope

   www.spaceopedia.com › astronomy › telescopes

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   Apr 26, 2019 · The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an airborne 2.5m (8.2 ft) telescope which conducts infrared observations from the back of a modified Boeing 747 Jumbo jet.

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5. www.nasa.gov › wp-content › uploadsSOFIA - NASA's Stratospheric Observatory for Infrared Astronomy

   www.nasa.gov › wp-content › uploads

   SOFIA features a German-built far-infrared telescope with an effective diameter of 100-inches (2.5 meters). The telescope weighs 19 tons (38,000 pounds) and is mounted in the rear fuselage of a highly modified Boeing 747SP aircraft.

6. Videos

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     11:26

     youtube.com

     Inside NASA's SOFIA Airborne Astronomical Observatory

     13 Mar 2014

     88.2K views

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     2:55

     space.com

     SOFIA: NASA's prematurely canceled airborne telescope that left a gap behind

     7 Nov 2019

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     5:00

     youtube.com

     How does SOFIA work? A tour of the flying observatory

     27 Jul 2021

     3.4K views

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7. www.space.com › sofia-observatoryNASA's SOFIA observatory: the flying telescope | Space

   www.space.com › sofia-observatory

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   Jan 30, 2023 · The Stratospheric Observatory For Infrared Astronomy (SOFIA) was a telescope mounted on a Boeing 747 SP aircraft that studied infrared light, essentially heat, emitted by objects in the universe.

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8. www.dsi.uni-stuttgart.de › en › publicObservatory | Deutsches SOFIA Institut | University of Stuttgart

   www.dsi.uni-stuttgart.de › en › public

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   The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an extensively modified Boeing 747SP aircraft carrying a 2.7-meter (106 inch) reflecting telescope (with an effective diameter of 2.5 meters or 100 inches).

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9. science.nasa.gov › mission › sofiaSOFIA - NASA Science

   science.nasa.gov › mission › sofia

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   The Flying Observatory SOFIA, the Stratospheric Observatory for Infrared Astronomy, was a Boeing 747SP aircraft modified to carry a 2.7-meter (106-inch) reflecting telescope (with an effective diameter of 2.5 meters or 100 inches).

10. ntrs.nasa.gov › api › citationsCapabilities, performance, and status of the SOFIA science ...

    ntrs.nasa.gov › api › citations

    The Stratospheric Observatory for Infrared Astronomy (SOFIA) is a telescope with an effective diameter of 2.5 meters, carried aboard a Boeing 747SP aircraft. The observing altitudes for SOFIA are between 37,000 and 45,000 feet, above 99% of the water vapor in the Earth’s atmosphere.