Across
- 4. an object in the sky that sends out its own light
- 5. a place in space where gravity pulls so much that even light cannot get out
- 7. Pluto
- 9. a system of millions or billions of stars
- 11. Mercury, Venus, Earth, and Mars
Down
- 1. Jupiter and Saturn
- 2. the galaxy of which the sun and the solar system are a part
- 3. everything that orbits around the sun
- 6. a body that orbits the Sun and is massive enough for its own gravity to make it round
- 8. the star around which the Earth and the other planets and objects orbit
- 10. a regular path that one object makes around another