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