On May 5, 2021 SpaceX made first Starship SN15 clean landing without explosion flying to altitude of 10km hop. Elon Musk’s first twitter reaction included. is going to send people to Mars in 5 years. SN15 during flight was powered through ascent by three Raptor engines, each shutting down in sequence prior to the vehicle reaching apogee – approximately 10 km in altitude. SN15 performs a propellant transition to the internal header tanks, which hold landing propellant, before reorienting itself for reentry and a controlled aerodynamic descent.