The latest secretive mission of the United States Air Force’s X-37B space plane has cruised beyond 500 days in Earth orbit since its launch into orbit last year.
from Space.com ift.tt/2dX76BK
The latest secretive mission of the United States Air Force’s X-37B space plane has cruised beyond 500 days in Earth orbit since its launch into orbit last year.
from Space.com ift.tt/2dX76BK
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