Photos: Atlas 5/MMS launch gallery

NASA announced Friday a mix of spaceflight veterans and rookie astronauts who will launch on the first flights of new Boeing and SpaceX commercial spaceships starting as soon as next spring, several months later than previously scheduled.

Follow the key events of the Falcon 9 rocket’s ascent to orbit with the third set of 10 next-generation satellites for Iridium’s voice and data relay fleet.

The nuclear power generator for NASA’s Perseverance rover has been installed on the spacecraft atop an Atlas 5 rocket at Cape Canaveral, and mission managers gave a green light Wednesday to continue preparations for the rover’s July 30 launch toward Mars.