Earth and Space Systems

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Across
  1. 1. the fourth planet from the sun
  2. 4. the 7th planet from the sun
  3. 8. a small rocky body that orbits the sun
  4. 10. what scientists use to look closely at the sky
  5. 15. a three-dimensional circle
  6. 16. when an object spins
  7. 17. a group of parts that work together
  8. 19. the sixth planet from the sun
  9. 20. the distance from one side of a circle or sphere to the other
Down
  1. 2. the distance from the center of a circle to any point on its circumference
  2. 3. one of the very large groups of stars and other matter in the universe
  3. 5. the sun, planets, asteroids, comets
  4. 6. all of the contents of space including all matter, energy, and galaxies (Mr. Mulvey calls it "the big enchilada.")
  5. 7. the largest planet in the solar system
  6. 9. when an object circles another object
  7. 11. the planet farthest from the sun in our solar system
  8. 12. the planet closest to the sun in our solar system
  9. 13. Earth is the ____________ plane t from the sun.
  10. 14. the second planet from the sun in our solar system
  11. 18. Earth has one. Jupiter has more than 80.