NASA's SOFIA observatory with a NASA F/A-18 trailing in chase soars over California City in the desert north of Edwards Air Force Base, Calif., on its last envelope-expansion test flight Aug. 4. The SOFIA's 2.5-meter infrared telescope and its associated telescope cavity doors are rotated open to their maximum 58-degree position in this view. (NASA photo / Carla Thomas)
Source: NASA
Source: NASA
