Live coverage: Kennedy Space Center to reopen Friday

United Launch Alliance called off a test-firing of the company’s first flight-rated Vulcan Centaur rocket at Cape Canaveral Thursday to troubleshoot a problem with the booster’s engine ignition system.

A commercial robotic lander developed by the Japanese company ispace was supposed to land on the moon at 12:40 p.m. EDT (1640 UTC) Tuesday, attempting to make history as the first privately-funded enterprise to achieve a controlled touchdown on the lunar surface. But mission controllers lost contact with the spacecraft just before landing.

SpaceX founder and CEO Elon Musk briefed reporters on the status of the Falcon Heavy test flight, and several of the company’s other projects, shortly after the huge rocket lifted off from NASA’s Kennedy Space Center in Florida.