SpaceX’s Starship SN11 prototype successfully landed after a high-altitude test flight on Tuesday, but exploded about 10 minutes later.The rocket took off from SpaceX’s Boca Chica, Texas launch site at 8:19 p.m. EST on Tuesday. It reached an altitude of about 10 kilometers (6 miles) before descending back to Earth. The Starship SN11 prototype successfully landed at about 8:29 p.m. EST.The successful landing was a major milestone for SpaceX, as it was the first time a Starship prototype had successfully landed from a high-altitude test flight. However, about 10 minutes after landing, the Starship SN11 prototype exploded.The cause of the explosion is currently under investigation. SpaceX founder and CEO Elon Musk said on Twitter that the explosion was likely caused by a .