Watch as SpaceX test-fires Falcon 9 ahead of Starlink launch (members only)

The launch comes as the commercial astronaut mission, Polaris Dawn, is preparing for an on-orbit demonstration of the satellite internet service. Liftoff from Vandenberg Space Force Base happened at 6:45 p.m. PDT (9:45 p.m. EDT, 0145 UTC).

A sophisticated combat-ready U.S. military missile warning satellite moved to its launch pad at Cape Canaveral Space Force Station Saturday on top of a United Launch Alliance Atlas 5 rocket, ready for liftoff Monday afternoon.

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.