"Rocket Fuel" refers to the propellant used to power rockets and spacecraft. It can be in the form of liquid or solid substances that burn to produce thrust, allowing rockets to escape Earth's gravity. Common types of rocket fuel include liquid oxygen combined with liquid hydrogen or kerosene. These fuels are essential for launching satellites, space probes, and even crewed missions to destinations like the Moon or Mars. The choice of rocket fuel affects the performance and efficiency of a rocket. For instance, solid rocket boosters are often used for their simplicity and reliability, while liquid fuels offer better control over thrust. Understanding rocket fuel is crucial for advancements in space exploration and technology.