Space System

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Across
  1. 4. a number used to multiply one object to get another
  2. 6. a small object that orbits a big object
  3. 8. electromagnetic radiation
  4. 11. a large natural body that travels around the earth
  5. 12. an object in the night's sky that lights up and moves
  6. 13. a measure of the amount of matter in objects
  7. 14. a reign beyond neptune
  8. 16. this is a sphere made of mostly ice material
  9. 17. traveling around another object
  10. 18. a unit of measurement that measures the distance that light travels in a year
Down
  1. 1. lines up all electromagnetic based on their wavelengths
  2. 2. a small planet
  3. 3. a big circular body tat moves in an elliptical orbit around a things
  4. 5. and instrument used to see far away
  5. 6. system where are space is
  6. 7. the science that deals with the universe
  7. 9. an imaginary line about which a body rotates
  8. 10. it between the rocky planets and gas planets
  9. 15. lumps of ice , dust, and rock that circle the sun