Photos: Atlas 5 rocket aims for International Space Station

SpaceX is replacing two engines on the Falcon 9 booster set to launch four astronauts next month on the company’s first operational Crew Dragon flight to the International Space Station, following an investigation that revealed a subcontractor failed to adequately clean out narrow vent ports on multiple engines across the company’s fleet, officials said Wednesday.

A Soyuz spacecraft carrying a Russian commander, a NASA flight engineer and a Japanese physician-astronaut docked with the International Space Station early Tuesday, capping a smooth two-day rendezvous to boost the lab’s crew back to six.

Two CubeSats developed at NASA’s Jet Propulsion Laboratory launched May 5 with the InSight mission to Mars have deployed their miniaturized antennas and captured a distant family portrait of the Earth and the moon.