High Energy Astronomy Observatory
NASA launches the first High Energy Astronomy Observatory satellite in Earth orbit, continuing the survey of the sky with sensitive detectors designed to find gamma ray and X-ray sources. HEAO-1 will remain in service through January 1979, and will re-enter Earth’s atmosphere in March 1979.
Enterprise Approach & Landing Test 1
Released from its 747 Shuttle Carrier Aircraft in mid-air for the first time, and airborne on its own for the first time, the Space Shuttle Enterprise takes wing over the dry lake bed at Edwards Air Force Base for a test landing. With no engines on board (a test shuttle that will never go into orbit, Enterprise isn’t equipped with them) and only one shot at a safe landing, Enterprise successfully touches down on the runway after a flight lasting only a few minutes, validating the unpowered approach method of landing a shuttle just returned from space.