Q&A with Sara Seager, deputy director of science on NASA’s TESS mission (members only)

As SpaceX gets ready for the maiden flight of its Falcon Heavy booster, watch a live feed of launch pad 39A at the Kennedy Space Center. (Members only)

SpaceX’s next Falcon 9 rocket arrived at launch pad 39A Thursday for a customary hold-down engine firing. Liftoff from Florida’s Space Coast is targeted for Sunday, weather permitting.

A SpaceX-owned Dragon cargo craft departed the International Space Station at 1011 GMT (6:11 a.m. EDT) Friday, and made a parachute-assisted splashdown in the Pacific Ocean at 1547 GMT (11:47 a.m. EDT) with more than 3,000 pounds of cargo, research specimens and other hardware.