Across
- 3. Invented by Galileo
- 5. A theory Einstein came up with
- 6. The most likely way for the universe to die
- 9. The sun
- 11. The moon
- 12. A planet in our solar system with huge ring
- 13. Tries to pull the universe apart
- 14. A particle of light
- 15. Death of a huge star
- 16. Pale blue dot
- 17. At the center of the black hole
Down
- 1. Inescapable
- 2. All the universe we can see and interact with
- 4. Sphere of burning gas (mostly hydrogen)
- 7. Can only interact with other stuff with gravity
- 8. The closest star to the sun
- 10. Uranus