Elon Musk’s SpaceX is poised to launch its deep-space Starship rocket system Saturday from South Texas for the second time ever, a critical mission roughly seven months after the vehicle’s first major test flight ended explosively in mid-air.

The Starship spacecraft, designed to launch on top of its massive Super Heavy booster, is set for lift-off at 7 a.m. local time from SpaceX’s Starbase launch site in Boca Chica, Texas. The company has a 20-minute launch window on Saturday.