Video: Liftoff of Atlas 5 rocket with Mexico’s Morelos 3

Problems with a downrange tracking station kept Rocket Lab’s Electron launcher on the ground in New Zealand Friday, U.S. time, and the company ordered a two-day delay to resolve the issues and wait for improved weather. Rocket Lab pushed back the launch again to Tuesday because of unfavorable weather.

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.

On course to collect specimens from asteroid Bennu after its launch last year, NASA’s OSIRIS-REx spacecraft will search this month for objects locked in orbits near Earth, a bonus science opportunity to locate possible fragments of the primordial building blocks that formed our home planet.