Across
- 4. one of the if not the smallest black hole
- 6. quiet weird
- 10. the coldest thing in the universe
- 11. the universes biggest thing
- 12. probably the worst holiday place
- 13. a giant in Greek mythology who was buried under Mount Etna
Down
- 1. the largest known black hole in the universe
- 2. thought to be the closest planet to the sun
- 3. known for having water
- 5. put a ring on it
- 7. the smallest named moon in the solar system
- 8. primordial black holes
- 9. approximately 4,300c (7,800f)