SpaceX’s Polaris Dawn private astronaut mission launched from Kennedy Space Center, sending four private astronauts on a five-day mission in Earth orbit.

Boeing Starliner undocks from the International Space Station on its return journey without astronauts.

The Federal Aviation Administration has temporarily grounded Falcon 9 launches following a failed landing on Aug. 28. This is the second time the FAA has halted the rocket this year.

After $450 million and six years of work, NASA will not be exploring lunar ice with its new rover. The Volatiles Investigating Polar Exploration Rover (VIPER) is already built, and the rocket is still scheduled to launch next year, but the rover will remain on...