As SpaceX readies Starship’s next test, questions over refueling and mass limits threaten its lunar and Martian goals.

The ninth flight test of SpaceX's Starship megarocket is scheduled for later today, with an hour-long launch window opening at 7:30 p.m. EDT (2330 GMT). A livestream of Starship Flight Test 9 will be available on the Space.com homepage and YouTube channel, as well as on SpaceX's Flight 9 mission page, the @SpaceX X account and X TV app.

SpaceX's massive Starship launch vehicle is set for a launch late Tuesday from Boca Chica in South Texas. Here's how to watch live.

Physicists who record rocket launches and landings are learning important facts about the acoustics of spaceflight.

The final concept, which was unveiled in 2019, consisted of a Starship composed of stainless steel instead of carbon fiber (per the original proposal), with reusable heat shield tiles on the windward side (similar to the Space Shuttle).