Live coverage: International crew lands in Kazakhstan

A troublesome liquid oxygen valve on the Space Launch System’s first flight-rated core stage will keep NASA from performing a second test-firing of the rocket’s four main engines this week.

For the second time in less than a week, astronauts will leave their quarters inside the International Space Station on Thursday to outfit a relocated docking adapter to eventually receive Boeing and SpaceX commercial crew capsules.

Bigelow Space Operations says it will charge $52 million per seat to send private astronauts to the International Space Station aboard Crew Dragon ferry ships, and has already paid “substantial sums” to SpaceX for up to four dedicated crew missions to the orbiting research complex.