SpaceX is under tremendous pressure to have Starship ready to fly the Artemis 3 crew to the Moon - and land there - by late 2026. Starship's test flights are also part of the key to making sure potential future missions to the Moon and Mars don't run out of gas on the way.
The payload for these flights is data.
Super Heavy uses a combination of liquid oxygen and methane to get off the ground. Despite the exhaust blasting out the back end of the rocket at several thousand degrees Fahrenheit, the propellant in Super Heavy's tanks has to be kept at a chilly -300 degrees Fahrenheit.
Engineers moved propellant from the header tanks to the main tanks while the ship was coasting in orbit. That's going to be an important step for the Artemis III and IV miss
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