Rocket ship is a term used for a space vehicle designed for interstellar travel. Synonyms for rocket ship include spacecraft, spaceship, shuttle, cosmonaut craft, and interstellar vessel. Spaceship primarily refers to a vehicle that travels beyond the reach of the Earth's atmosphere, while a shuttle is designed to ferry astronauts, equipment, or cargo between two locations in outer space. Interstellar vessel is a general term that refers to any vehicle that travels between stars. Cosmonaut craft is a term used to describe a spacecraft designed by the Russian Federation or the former Soviet Union. Regardless of what synonym you use, all refer to vehicles that can take humans out of this world and into the depths of the universe.