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 designed to withstand the harsh conditions of space, including extreme temperatures and radiation. There are two main types of spaceflight: crewed and uncrewed. Crewed missions carry astronauts, while uncrewed missions are operated remotely or autonomously. Organizations like NASA and private companies such as SpaceX are actively involved in developing technology and conducting missions to explore space and expand our understanding of the universe.