Q&A with Keith Gendreau, principal investigator of the first X-ray space communications experiment (members only)

Take a trip around the perimeter of the Ariane 5 rocket’s launch zone in Kourou, French Guiana, where two Intelsat communications satellites are poised for liftoff Wednesday.

Follow the key events of the Falcon 9 rocket’s ascent to orbit 60 satellites for SpaceX’s Starlink broadband network.

NASA’s OSIRIS-REx spacecraft made a touch and go landing on asteroid Bennu at 6:12 p.m. EDT (2212 GMT) Tuesday. The craft aimed to collect samples from the asteroid’s gravely surface for return to Earth in 2023 for scientists to search for clues about the origins and evolution of the solar system.