Across
- 2. What planet does not have an atmosphere
- 4. Planet with a runaway green house effect
- 7. Explosion of a high mass star
- 10. When gravity pulls gas and dust together to form objects
- 11. All gas planets have ____
- 12. Galaxies that are round in shape
- 14. Planet must have this for life
- 17. dim but hot stars on the HR diagram
- 18. Redshift is moving_____
- 19. As temperature increases on the HR diagram, Brightness ____
Down
- 1. What planet's atmosphere weakened drastically
- 2. Stage of our sun
- 3. Largest planet in our solar system
- 5. Stars get energy from Nuclear ____
- 6. Planet with a hexagon storm
- 8. Our solar system formed by the solar ______ theory
- 9. planets that have the capacity for life are__
- 13. Galaxies with no definite shape
- 15. The milky way is a _______ galaxy
- 16. Blueshift is moving ___