https://peertube.dngr.us/videos/watch/77f72407-32e9-47d6-aa70-60bdd72d6d05 This 1-minute, 17-second video clip from August 20, 2010 shows in-flight footage of NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) aircraft completing a second series of envelope-expansion flight tests with its telescope door open. After these flights, the SOFIA was fully cleared for astronomy missions at altitudes up to 45,000 feet and telescope elevations up to 58 degrees. After installation and checkout of the remaining systems, the airborne observatory began its first infrared astronomy missions in late 2010. The SOFIA aircraft is operated by NASA's Armstrong Flight Research Center and based at Hangar 703 in Palmdale, CA. To learn more about SOFIA visit: https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-096-DFRC.html Mirrored from YouTube: https://youtu.be/2j8sK-HZ5DA Original channel: NASA Armstrong Flight Research Center Wed, 15 Jul 2026 10:39:25 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/ec5edb1e-3795-4978-be4f-c67e98fbc992.png https://peertube.dngr.us/videos/watch/77f72407-32e9-47d6-aa70-60bdd72d6d05 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.