In its fourth text flight, the reusable rocket survived its return to earth, heralding a workable business model of reusable spacecraft for commercial launch industry, and possible manned missions to the moon--and Mars.

Elon Musk’s moon and Mars rocket reached space in March, but on Thursday SpaceX aims to see the spacecraft survive atmospheric re-entry.

SpaceX completed a test flight of its Starship rocket for the first time on Thursday. The fourth Starship test flight completed new milestones as SpaceX continues to advance development of the mammoth vehicle.