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

A 139-foot-tall Antares rocket is slated for a predawn launch Monday from the Mid-Atlantic Regional Spaceport on Virginia’s Eastern Shore, carrying a Cygnus supply ship heading for the International Space Station.

SpaceX has moved up its next launch to Wednesday, one day earlier than previously planned. A Falcon 9 rocket will take off with the next 60 satellites for SpaceX’s Starlink broadband Internet network at 3:37 p.m. EDT (1937 GMT) Wednesday from pad 39A at NASA’s Kennedy Space Center in Florida. There’s a 90 percent chance of favorable weather for launch Wednesday.

A little more than a year after the Falcon Heavy rocket’s first test flight, SpaceX teams on Florida’s Space Coast are readying the world’s most powerful operational launcher for its second mission Thursday with a commercial communications satellite.