Why Six Orbital Laps Matter for Artemis
Unlike suborbital and transatmospheric trajectory tests (Flights 1 through 5), an operational 6-lap orbital qualification proves that the thermal protection tiles survive prolonged space exposure, reaction control thrusters maintain precise attitude over hours of coasting, and cryogenic liquid oxygen and methane remain pressurized inside internal header tanks without premature boiloff.
In-Orbit Vacuum Relight & Controlled Deorbit
To clear NASA's stringent safety criteria for human lunar missions, Starship must prove its Raptor vacuum engines can reignite reliably in microgravity after extended orbital drift. This burn provides the decisive deceleration vector necessary to drop the perigee into Earth's upper atmosphere over the targeted Indian Ocean entry corridor.