helooooo

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