Snapshots from Atlas 5 launch

Helium leaks and thruster issues prompted NASA to extend their stay aboard the space station indefinitely — Wednesday marked their 35th day in orbit — while engineers carry out tests and analysis to better understand what caused the problems and to make sure the spacecraft can safely being Wilmore and Williams home.

As soon as next year, NASA plans to launch a CubeSat the size of a microwave oven into a unique elliptical orbit around the moon as a scout for the future lunar Gateway, a mini-space station NASA intends to use as a staging point for crewed lunar landings beginning as soon as 2024.

Scientists marked the 10th anniversary of the launch of NASA’s Lunar Reconnaissance Orbiter on Tuesday, celebrating a mission that has greatly outlived its original one-year design life and continues taking high-resolution pictures to help U.S. companies and international space agencies select destinations for moon landers.