Live coverage: Four more O3b broadband launch aboard Soyuz rocket

The final flight of a discontinued version of Europe’s Ariane 5 rocket added four more spacecraft to Europe’s Galileo navigation constellation Wednesday, giving the multibillion-euro network enough satellites to remain on track for the start of full global service in 2020.

A commercial communications satellite stayed on Earth after a last-second launch abort Sunday, the third time in five days that SpaceX has scrubbed the launch of a Falcon 9 rocket from Cape Canaveral.

SpaceX test-fired a Falcon 9 rocket at Cape Canaveral on Saturday evening, clearing the way for a delayed liftoff with the Israeli-owned Amos 17 commercial communications satellite as soon as Tuesday, assuming SpaceX can work its way into a busy schedule before a previously-planned Atlas 5 launch this week on the U.S. Air Force’s Eastern Range.