What fuel does NASA use?

NASA uses a variety of fuels depending on the mission and type of spacecraft. For rocket launches, common fuels include liquid hydrogen and liquid oxygen for the Space Launch System (SLS) and the Space Shuttle's main engines, while solid rocket boosters use a composite propellant. Other missions may utilize hydrazine for thrusters and various other fuels for smaller spacecraft. The choice of fuel is based on efficiency, safety, and mission requirements.