Across
- 5. the sun and the group of planets that move around it, or a similar system somewhere else in the universe.
- 6. an object like a very large rock that goes around the sun like a planet.
- 9. a group of stars in the sky that appear to form a pattern and that have a name.
- 11. a piece of matter from space that has landed on earth.
- 13. an extremely large, round mass of matter, such as Earth or Mars, that moves in a circular path around the sun or another star.
- 15. a vehicle designed for travel in space.
Down
- 1. the pale strip of stars across the sky that forms part of the galaxy that includes the earth.
- 2. a large hole in the top of a volcano. It is also a large hole made by something hitting the ground with force.
- 3. a large cylindrical object that moves very fast by forcing out burning gases, and that is used for space travel or as a weapon.
- 4. a small piece of matter that falls from space with great speed, producing a bright light as it enters the earth’s atmosphere.
- 7. the curved path through which objects in space move around a planet or star that has gravity.
- 8. a body of rock and ice that travels around the sun and that, as it nears the sun, develops a long tail of small pieces that can be seen.
- 10. a period of time when the light from an object in the sky cannot be seen because another object has come between you and it.
- 12. one of the large, independent groups of stars in the universe.
- 14. a person who is trained for traveling in spacecraft.