Astronomy Introduction

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Across
  1. 6. The space between two objects; affects gravity.
  2. 7. The smallest planet in our solar system.
  3. 8. The force that pulls two objects toward each other.
  4. 9. The study of space and the universe.
  5. 12. The model that places Earth at the center of the universe.
  6. 13. A collection of stars, gas, and dust held together by gravity.
  7. 14. The regular, repeating path an object takes in space.
  8. 17. A space object made of rock and metal, often found in a belt.
  9. 18. A space rock that has landed on Earth's surface.
  10. 20. A dirty snowball made of ice, rock, and dust.
  11. 21. The amount of matter in an object; affects gravity.
Down
  1. 1. The largest planet in our solar system.
  2. 2. The model that places the Sun at the center.
  3. 3. Physical things like stars and planets that make up the universe.
  4. 4. An event where one space body blocks the light of another.
  5. 5. When the visible light on the moon is increasing.
  6. 10. The shape of the Milky Way galaxy.
  7. 11. Way, The name of our home galaxy.
  8. 15. The movement of a planet around the Sun.
  9. 16. When the visible light on the moon is decreasing.
  10. 19. The spinning of a planet on its axis.