Across
- 4. a large ball of burning gas in space.
- 5. a large object such as Jupiter or Earth that orbits a star.
- 6. a spacecraft that is sent into orbit around a planet.
- 7. the earth's natural satellite that shines at night.
- 8. a building from which scientists can watch the planets, the stars, etc.
- 9. a person who travels into outer space.
Down
- 1. A scientist who studies the objects in the sky, including planets, galaxies, black holes, and stars.
- 2. an object in space like a bright ball with a long tail.
- 3. a vehicle used for space travel.
- 6. station a place built for astronauts to live and work in, which is sent into space.