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

SpaceX completed its third attempt to launch the Starlink 6-44 mission Friday night. Liftoff 8:21 p.m. ET (0021 UTC).

Watch as SpaceX successfully returns the first stage of its Falcon 9 booster to a landing at Cape Canaveral just minutes after it blasted off.

With Hurricane Isaias threatening Florida’s East Coast, astronauts Doug Hurley and Bob Behnken are awaiting a go-ahead on plans to undock from the International Space Station Saturday, setting up a fiery plunge to splashdown Sunday, presumably in the Gulf of Mexico, to close out a 64-day flight.