Live coverage: Vega rocket launches with LISA Pathfinder

A wave of clock failures on Europe’s Galileo navigation satellites has not knocked any of the craft offline, but officials want to better understand the problem before launching more satellites into the fleet.

An Ariane 5 rocket launched from French Guiana at 2150 GMT (5:50 p.m. EDT) Thursday with a pair of European-built communications satellites for the Brazilian government and KTsat, a South Korean telecom operator. Liftoff was delayed more than one hour to resolve a problem with ground equipment.

Turkmenistan’s first satellite has blasted off aboard a SpaceX Falcon 9 rocket from Cape Canaveral in Florida after a weather delay. Liftoff occurred at 7:03 p.m. EDT (2303 GMT).