Watch Live! SpaceX's Starship Flight 4 Test Mission

SpaceX's Starship Flight 4 mission is the fourth test flight of the company's Starship and Super Heavy launch vehicle. When fully assembled, they stand nearly 400 feet tall and are the world's largest and most powerful rocket. SpaceX has designed Starship as a fully reusable ultra-heavy lift launch system for missions to the moon, Mars and beyond. NASA's Artemis program, for one, has selected Starship as the lander to carry Artemis 3 astronauts to the south pole of the moon in 2026.