Live coverage: Two satellites lift off aboard Ariane 5

SpaceX and OneWeb — space industry rivals and owners of two of the largest fleets of commercial satellites — are set to add more spacecraft to their internet networks Wednesday with launches from Cape Canaveral and Russia.

An 11-hour practice countdown was completed Friday at Cape Canaveral’s launch complex 41 for the planned launch of an Atlas 5 rocket and Boeing’s Starliner capsule later this month. The rocket was loaded with super-cold liquid oxygen and liquid hydrogen in a full dress rehearsal for launch day.

Veteran Soyuz commander Yuri Malenchenko, outgoing space station skipper Tim Kopra and British astronaut Tim Peake departed the International Space Station early Saturday aboard the Soyuz TMA-19M capsule and landed in Kazakhstan at 0915 GMT (5:15 a.m. EDT).