Watch the Falcon 9 launch from pad 39A

Mitsubishi Heavy Industries, the prime contractor for Japan’s H-2B rocket, said Friday that engineers concluded a fire on the launch pad during a countdown earlier this month was most likely sparked by static electricity and stimulated by oxygen. The H-2B rocket launch has been rescheduled for Tuesday to start a resupply mission to the International Space Station.

A prototype of Sierra Nevada’s Dream Chaser space plane is nearing shipment to California’s Mojave Desert to resume runway landing tests as officials wait for word from NASA whether the company will win a competition to ferry cargo to the International Space Station.

SpaceX test-fired nine Merlin engines Saturday before the company’s next launch from Cape Canaveral, clearing a key readiness test before liftoff as soon as Sunday night with 60 more Starlink internet satellites.