Expect a SpaceX Falcon 9 rocket to take flight this afternoon just before 4 p.m. from Florida's Space Coast — a couple of hours before Boeing Starliner astronauts Butch Wilmore and Suni Williams should splash down off the Sunshine State after their unexpectedly long stay aboard the International Space Station.

SpaceX is preparing to launch 23 Starlink satellites from Cape Canaveral, Florida, with a launch window opening at 3:57 p.m.