Live coverage: Space station crew back on Earth

Two Russian cosmonauts and a U.S. Navy test pilot will buckle into custom-molded seats inside a Soyuz spaceship Wednesday, undock from the International Space Station and head for a parachute-assisted landing in Kazakhstan to close out a 167-day space voyage.

With lingering uncertainty about when new U.S. commercial vehicles can regularly carry crews to the space station, NASA said Tuesday it will pay the Russian space agency more than $90 million for a round-trip ticket to the International Space Station on a Soyuz spacecraft later this year.

Sending the OSIRIS-REx spacecraft on an interplanetary trajectory to Asteroid Bennu, a United Launch Alliance Atlas 5 rocket thunders away from Cape Canaveral Thursday at 7:05 p.m. EDT (2305 GMT).