A Crew Exploration Vehicle (or CEV) is a special vehicle that astronauts use to explore the universe. Astronauts use CEVs to explore planets, moons and comets. It is like a car, but much more powerful, since it needs to be able to travel in space and withstand extreme temperatures, high pressure and gravity. CEVs are equipped with advanced technology, like cameras and robotic arms, to help astronauts take photographs and collect rocks and other materials from outer space. These vehicles help astronauts discover new things and explore the unknown.