Apollo 11 launch as broadcast live by NASA on July 16, 1969

NASA has suspended science operations with the Hubble Space Telescope and put the observatory into protective “safe mode” while engineers troubleshoot problems with one of the spacecraft’s three remaining gyroscopes, used to help aim the telescope and keep it locked on target, officials said Monday.

The Air Force’s robotic X-37B mini space shuttle swooped out of obscurity today after 718 days spent in orbit on a secretive military mission, touching down at the Kennedy Space Center’s orbiter runway on autopilot, the military announced on Twitter.

At NASA’s Kennedy Space Center, workers have finished the pre-launch assembly and fueling of OSIRIS-REx for the asteroid sample return spacecraft for liftoff Sept. 8.