Across
- 3. when a supernova dies down and collapses
- 5. a galaxy that contains the solar system
- 6. hottest planet in our solar system
- 8. largest planet in a solar system with around sixty moons
- 9. the planet with the most rings in our solar system
- 10. most massive, second largest dwarf planet in the solar system
- 12. considered both a planet and a dwarf planet
- 13. 3 times as long as the Grand Canyon; once called "Easter Bunny"; dwarf planet
- 15. the only planet in our solar system that orbits on its side; the least dense planet
- 17. the core of a supernova/supergian star
- 18. shaped like an egg, named after Hawaiian goddess; dwarf planet
- 19. a very large star brighter than a giant star
- 20. a spheroid (ball) made out of hydrogen, helium and plasma
- 21. only known planet that can obtain life
Down
- 1. a body in the universe that contains millions or billions of stars
- 2. closest planet to the sun
- 4. the red planet; contains ferricoxide that makes it look very red
- 5. a star that fuses hydrogen atoms to form helium atoms in its core
- 7. smallest gas giant; surface gravity almost Earth-like
- 9. a main sequence star located in our solar system; all the planets orbit around it
- 11. when a star explodes MASSIVELY
- 14. a galaxy that neighbors the Milky way
- 16. a body of interstellar stars