Artemis uses liquid hydrogen and liquid oxygen as its main rocket propellants, stored super-cold and burned together in the RS-25 engines of NASA’s Space Launch System. The fuel setup is often described as LOX/LH2.

Quick Scoop

  • Fuel: liquid hydrogen.
  • Oxidizer: liquid oxygen.
  • Why this combination: it gives very high efficiency and strong thrust for heavy-lift missions.
  • What comes out of the exhaust: mostly water vapor.

If you want, I can also explain why NASA chose hydrogen instead of kerosene or methane in simple terms.