space

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Across
  1. 3. planet composed primarily of silicate rocks or metals.
  2. 6. a small body of water
  3. 7. a rock from space that hits earth's ground
  4. 8. energetic charged particles that originate from solar winds
  5. 10. an illusion caused by objects in our solar system orbit the Sun
  6. 11. a small icy solar system body
  7. 12. fundamental system in condensed matter
  8. 13. a disk in the outer solar system
  9. 14. distance from a star at which liquid water could exist on orbiting planets
  10. 16. pluto is one of them
  11. 17. planet composed of hydrogen and helium
  12. 18. pieces of junk in space
Down
  1. 1. a lot of meteor's together
  2. 2. body that can come together to form a planet.
  3. 4. distance from the center of the earth to the sun
  4. 5. its called a shooting star
  5. 9. a measure of how circular an orbit is
  6. 15. a circle which has been squashed or flattened a bit