dome - an object shaped like the top part of a ball, orbit - the path an object takes when it moves around a larger object in space , rocket - a long, thin space vehicle, gravity - the force that pulls two things towards each other, galaxy - a large group of stars and planets, space station - a place where people can live in space , atmosphere - the air around the Earth or a planet, spacecraft - any type of vehicle that can travel in space, base - the main place where a person lives and works, oxygen - a kind of gas we usually breathe in, colony - a group of people who live in a particular place, surface - the top, outside part of something,

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