SOFIA airborne observatory makes first pictures

The Stratospheric Observatory for Infrared Astronomy (SOFIA), a joint program by NASA and the German Aerospace Center, achieved a major milestone May 26, with its first in-flight night observations.

SOFIA im Rumpf

Das SOFIA Teleskop im Rumpf der Boeing 747SP. Foto und Copyright: NASA/ Tschida  


The highly modified SOFIA Boeing 747SP jetliner fitted with a 100-inch  diameter reflecting telescope took off from its home base at the Aircraft Operations Facility in Palmdale, Calif., of NASA's Dryden Flight Research Center. The in-flight personnel consisted of an international crew from NASA, the Universities Space Research Association in Columbia, Md., Cornell University and the German SOFIA Institute (DSI) in Stuttgart. During the six-hour flight, at altitudes up to 35,000 feet, the crew of 10 scientists, astronomers, engineers and technicians gathered telescope performance data at consoles in the aircraft's main cabin.

The stability and precise pointing of the German-built telescope met or exceeded the expectations of the engineers and astronomers who put it through its paces during the flight.

"The crowning accomplishment of the night came when scientists on board SOFIA recorded images of Jupiter," said USRA SOFIA senior science advisor Eric Becklin. "The composite image from SOFIA shows heat, trapped since the formation of the planet, pouring out of Jupiter's interior through holes in its clouds."

The highly sensitive Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST) used for these initial observations was operated in flight by its builders, a team led by Cornell's Terry Herter. FORCAST captures in minutes images that would require many hour-long exposures by ground-based observatories blocked from a clear infrared view by water vapor in the Earth's atmosphere. SOFIA's operational altitude, which is above more than 99 percent of that water vapor, allows it to receive 80 percent or more of the infrared light accessible to space observatories.

"With this flight, SOFIA begins a 20-year journey that will enable a  wide variety of astronomical science observations not possible from other Earth and space-borne observatories," said Jon Morse, Astrophysics Division director in the Science Mission Directorate at NASA Headquarters in Washington.

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