NASA has begun testing a new all-glass telescope for the LISA mission, which aims to detect gravitational waves. The test is part of ongoing development for the space observatory.
Two large asteroids in the asteroid belt were found to rotate extremely quickly, challenging current models of asteroid structure. The researchers observed these high rotation rates using telescopic measurements.
Four astronauts returned to Earth on Thursday after spending eight months aboard the International Space Station, having been sent to replace a crew member and his team.
The satellite has transmitted initial images and data from two of its instruments, indicating it is functioning properly and preparing to monitor Earth's oceans and land.