This was Starship's 14th full-scale launch from Texas' southern tip in three years. Previous test flights went no farther than the Indian Ocean, often crashing in flames.

Why did SpaceX end the flight early?

Flight controllers chose to "play it safe" once the spacecraft achieved orbit, cutting the mission from nearly 10 hours to about three. SpaceX has not explained the specific decision.

The company's caution has a clear rationale. Elon Musk, speaking at a business summit earlier this month, warned that flying Starship back over land before everything works could be costly. If the spacecraft breaks apart over land and rains debris onto people, "our popularity would diminish very rapidly," Musk said. "That's why we're being extremely cautious here."

NASA Administrator Jared Isaacman congratulated SpaceX on reaching orbit and "managing every step in a safe, responsible and especially inspirational way."

What comes next for Starship?

Depending on what Monday's flight reveals, the next Starship could attempt a return to the launch pad, where giant mechanical arms would grab the hovering spacecraft mid-air. Musk puts the odds of a successful catch at even or slightly better. If it works, SpaceX plans to refly the spacecraft by year's end or early next year.

Reusability sits at the heart of the design. The rocket was built from the start to fly again and again, which SpaceX sees as the key to lowering launch costs. The company salvaged the previous Starship from the Indian Ocean in July, and engineers modified the new spacecraft's heat shield — the protective layer that shields it during atmospheric reentry — based on hands-on inspections of that recovered vehicle, which is now being tugged back to Starbase.

How does this fit into the moon plans?

Certifying Starship for orbital flight is a vital step toward NASA's Artemis moon program and eventual Mars travel.

NASA's Artemis III mission could launch as soon as next summer. It is a triple-launch docking exercise in Earth orbit involving an Orion capsule carrying astronauts and two competing lunar landers. Jeff Bezos' Blue Moon would launch first, followed by Orion, and then Starship, which would dock with Orion after Blue Moon departs.

Artemis IV, slated for no sooner than 2028, would put astronauts on the lunar surface using whichever lander is ready first — Blue Moon or Starship. Later moon missions will alternate between the two.

Musk originally built Starship for Mars, envisioning fleets of the rocket carrying the red planet's first settlers. For now, his plans focus on the moon and on using Starship to haul satellites into orbit in bulk, gradually replacing SpaceX's smaller Falcon 9 rocket within several years.

A second Starship launch site is nearing completion at Florida's Kennedy Space Center, and a third is planned for Louisiana.