Across
- 3. When gas particles from the Sun collide with Earth's gases
- 4. Was once a planet
- 6. A huge star made of helium and hydrogen
- 7. A layer of gases surrounding a planet
- 8. Billions of these exist in the universe
- 10. The path a planet rotates on
- 11. A sphere of hot plasma
- 12. Gravity so powerful not even light can escape it
- 13. The third largest planet and the most tilted one
- 14. The angle a planet spins on
- 15. "One small step for man, one giant leap for mankind"
- 16. When two planets align
Down
- 1. It holds our planets, stars and anything that orbits
- 2. The last lunar phase; its also when the tides are at the highest
- 5. The first lunar phase; its also when the tides are the lowest
- 6. Summer, Winter, Spring, Autumn
- 9. A imaginary line that runs through the earth
- 10. The spinning of a planet
- 13. All of time and space
