The Solar System

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Across
  1. 1. What asteroids are made of.
  2. 4. Fastest thing in the universe.
  3. 7. Earth's closest neighbor.
  4. 8. What we see looking up.
  5. 11. A glowing ball of plasma.
  6. 13. The star we orbit.
  7. 14. The line a planet rotates on.
  8. 15. The red planet.
  9. 16. Once the ninth planet.
  10. 18. Used by astronomers to find stars.
  11. 19. Saturn has many of these.
  12. 21. A star that suddenly brightens.
  13. 23. Icy object with a tail.
  14. 24. What Jupiter is mostly made of.
Down
  1. 2. The path around a star.
  2. 3. Caused by the moon's gravity.
  3. 5. The hottest planet.
  4. 6. Small particles in space.
  5. 7. The amount of matter in an object.
  6. 9. A huge collection of stars.
  7. 10. The empty space between stars.
  8. 12. Our home.
  9. 17. Part of a telescope.
  10. 20. The center of a planet.
  11. 22. The "habitable" area for life.