Across
- 3. the force that attracts objects toward each other
- 7. is like a nursery to stars
- 8. a path celestial objects take around the sun
- 9. earth's natural satellite
- 11. a large collection of star, dust and gas 25,000 light years away
- 12. a big explosion after a large star dies
- 14. a planet with a rings around it
- 15. a system of stars gas planets all held together by gravity
Down
- 1. a bright object you can see in the night sky
- 2. the study of the universe
- 4. happens after a supernova not even light can escape it
- 5. the largest plant
- 6. the amount of light an object gives off
- 10. the fourth planet from the sun
- 13. when the moon goes in front of the sun or when earth is between the moon and sun