a large, round object in outer space that moves around a star
a planet
the sun and the group of planets that move around it
the solar system
the area beyond Earth that has stars, planets and moons
space
a large group of stars and planets
a galaxy
everything in outer space, including other galaxies
the universe
to move around on a curved path
orbit
the air that surrounds a planet
atmosphere
a person whose job it is to travel into outer space
an astronaut
a vehicle used for travel in space
a spacecraft
the act of travelling from one place to another
a journey
the act of going somewhere but not returning
a one-way trip
