The US Air Force's mysterious X-37B spacecraft returned to Earth on Sunday after more than two years of orbit. The unoccupied X-37B orbital test vehicle Mission 5 landed at NASA's Kennedy Space Center Shuttle Landing Facility at 3:51 pm ET Sunday, the Air Force confirmed. The 780-day mission has broken its own record of nearly 718 days in the orbit of spacecraft Mission 4 deployed on its return to Earth in May 2017, Space.com reported.
X-37B MILITARY SPACE PLANE'S LATEST MYSTERY MISSION PASSES 600 DAYS
Mission 5 was launched on September 7, 2017 from the Cape Canaveral Air Force Station in Florida aboard a SpaceX Falcon 9-Booster orbital, according to the Luftwaffe. Space.com noted that most of its payloads are still classified.
MYSTERY MISSION: AIRFORCE X-37B AIRPLANE NEAR 1 YEAR IN ORBIT
"The X-37B continues to demonstrate the importance of a reusable spacecraft," said Air Force Secretary Barbara Barrett in a statement. "Each mission in a row improves the space capabilities of our nation."
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The Air Force plans to launch a sixth X-37B from the Cape Canaveral Air Force Station in 2020.  Follow James Rogers on Twitter @jamesjrogers