Photos: Atlas 5 on the pad for X-37B launch

SpaceX scrubbed the launch of a nearly 7.5-ton Intelsat communications satellite Sunday after a computer-triggered abort halted the countdown in the final 10 seconds.

A second unpiloted test flight of Boeing’s Starliner crew capsule — ordered after an initial demonstration mission fell short of reaching the International Space Station — is now scheduled for launch from Cape Canaveral in August or September, leaving little margin to conduct the spaceship’s first flight with astronauts before the end of the year.

The European Space Agency’s Solar Orbiter spacecraft — assembled in Britain and set for liftoff in February — has completed environmental testing in Germany and is scheduled to ride a cargo plane to NASA’s Kennedy Space Center in Florida to begin launch preparations Oct. 31, several weeks earlier than planned to avoid complications stemming from Brexit.