Across
- 3. an event at the end of a supergiant stars life, which can shine brighter than the galaxy
- 6. multiple galaxies
- 9. a tiny planet, smaller than 3000km in diameter
- 11. planets with a surface
- 14. most planets are in this
- 17. an immensely big star
- 18. a small star
- 20. multiple galaxy clusters
Down
- 1. a planet not in a solar system
- 2. an area in space with so much gravity that not even light can escape
- 4. a star with great gravity
- 5. planets made of gas
- 7. a large star
- 8. what we are made of
- 10. a really large star
- 12. the fastest thing in the universe
- 13. one of the smallest things in the universe
- 15. an extremely magnetic neutron star
- 16. everything
- 19. the main light source in the universe