Live coverage: 400th Proton rocket takes off with Russian satellite

Stormy weather at the Kennedy Space Center forced SpaceX to scrub the liftoff of a Falcon Heavy rocket Thursday night carrying the ViaSat 3 Americas broadband satellite to a near-geostationary orbit.

A Vega rocket has blasted off with Europe’s LISA Pathfinder tech demo mission, a probe heading to a station a million miles from Earth to test systems for a future gravitational wave observatory. Liftoff from French Guiana occurred at 0404 GMT Thursday (11:04 p.m. EST Wednesday).

Four more satellites for SES Networks’ O3b broadband fleet launched Thursday aboard a Soyuz rocket. Liftoff of the Soyuz launcher from the Guiana Space Center in South America occurred at 1703 GMT (1:03 p.m. EDT).