SpaceX on Thursday released the most detailed public update in nearly two years on its multibillion-dollar contract to land astronauts on the Moon for NASA, amid growing sentiment that China is likely to beat the United States back to the lunar surface with humans.

CAPE CANAVERAL, Fla. – SpaceX early Sunday will attempt to launch the Bandwagon-4 mission from Cape Canaveral Space Force Station. The Falcon 9 launch is set for 1:09 a.m. and if needed, a backup opportunity will be available later that night at 11:44 p.m.