Spaceflight is the act of traveling beyond Earth's atmosphere using spacecraft. This can involve missions to low Earth orbit, such as those conducted by the International Space Station, or journeys to other celestial bodies like the Moon and Mars. Spacecraft are propelled by rockets, which generate thrust to overcome Earth's gravity. There are two main types of spaceflight: crewed and uncrewed. Crewed missions carry astronauts, while uncrewed missions are operated remotely or autonomously. Both types contribute to our understanding of space and support scientific research, technology development, and exploration efforts by organizations like NASA and SpaceX.