Across
- 3. the smallest planet in the Solar System and the closest to the Sun
- 4. the fifth planet from the Sun and the largest in the Solar System.
- 7. A small body that floats through the solar system and turns into a meteor when it enters an atmosphere
- 10. the eighth planet from the Sun
- 12. A meteor that survives burning in space
- 15. small, rocky objects that orbit the Sun
- 16. the second planet from the Sun. It is sometimes called Earth's "sister" or "twin" planet as it is almost as large and has a similar composition
- 18. the sixth planet from the Sun and the second-largest in the Solar System
- 19. an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
Down
- 1. frozen leftovers from the formation of the solar system composed of dust, rock, and ice.
- 2. galaxy A galaxy that does not have the clearly defined shape and structure of typical elliptical, lenticular, or spiral galaxies.
- 5. The planet on which we live
- 6. Natural satellite
- 8. A fixed illuminous point in the night sky
- 9. a small body of matter from outer space that enters the earth's atmosphere and begins to burn
- 11. the fourth planet from the Sun and the second-smallest planet in the Solar System
- 13. galaxy a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image
- 14. the seventh planet from the Sun, and has the third-largest diameter in our solar system.
- 17. galaxy a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms.
- 18. Star at the center of the solar system that the planets orbit around