Astronomy

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Across
  1. 3. the red planet, has polar ice cap
  2. 4. the galaxy our Solar System is located in
  3. 11. a group of billions of stars, dust, and gases held together by gravity
  4. 12. a central star with planets and other objects orbiting it
  5. 16. the farthest planet away from the sun
  6. 17. The largest planet in the solar system
  7. 19. a cloud of gases and dust found in outer space
  8. 20. the only planet with a vertical rotation
  9. 23. the only planet with life
  10. 25. The first planet away from the sun
  11. 26. glowing chunks of ice and gases with a long streaking tail
Down
  1. 1. colliding rocks, ice, dust begins a planet
  2. 2. a force of attraction between all objects
  3. 5. a measurement used for measuring distances in the Universe
  4. 6. the hottest planet in the Solar System
  5. 7. used to be a planet but now it's a dwarf
  6. 8. a measurement for the brightness of a star
  7. 9. the most visible ring system in all the planets in our solar system
  8. 10. a round object that orbits a star
  9. 13. a "shooting" star
  10. 14. the process where hydrogen atoms combine and convert to helium atoms that produce the energy inside a star
  11. 15. the path a planet takes around the sun
  12. 18. where energy is produced inside the Sun
  13. 21. space and all the matter and energy in it
  14. 22. a round gaseous ball of glowing gases
  15. 24. Large chunks of space rocks
  16. 25. Earth's natural satellite