As Elon Musk pulls back from his political work in the US government, the SpaceX chief is turning his attention back to his rocket company, planning an all-hands-style X livestream to discuss his long-term goal of sending humans to Mars.

Elon Musk was expected on Tuesday to present an update on SpaceX's plan to launch missions to Mars ahead of a high-stakes Starship test flight later in the day. Musk, the world's richest person and a key supporter of U.

SpaceX is set to conduct its ninth test flight of its Starship spacecraft after the vessel that it plans to ultimately use to send humans to space exploded in the sky during the two previous tests.