outer space

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Across
  1. 3. branch of science dealing with outer space
  2. 6. groups of solar systems, dust and gas
  3. 7. solid debris (rock) that originated from space
  4. 9. force that usually attracts a smaller object to a larger one
  5. 10. made of layers of gasses surrounding space object
  6. 13. planets rotate on this as they spin
  7. 14. fireballs that burn up in our atmosphere
Down
  1. 1. center of ice and dust with a tail of gas
  2. 2. a mass belonging to a solar system with a star
  3. 4. Earth does this around the sun
  4. 5. movement of space object revolving around star or planet
  5. 8. Earth does this on its axis in 24 hours
  6. 10. neither a planet or a comet in outer space
  7. 11. space rocks not found on Earth
  8. 12. mass that creates its own energy from fusion