Space System

2. lumps of ice , dust, and rock that circle the sun
5. the idea that the universe began with an explosion
6. a number used to multiply one object to get another
10. traveling around another object
11. a small object that orbits a big object
13. the science that deals with the universe
15. a small planet
16. a measure of the amount of matter in objects
18. this is a sphere made of mostly icy material
19. the calendar that we use today that was invented in 1582 by Jullian Calander

1. lines up all electromagnetic based on their wavelengths
3. everything that exsists in space
4. electromagnetic radiation
7. where are planets are
8. a unit of measurement that measures the distance that light travels in a year
9. an object in the night's sky that lights up and moves
12. a large natural body that travels around the earth
13. an imaginary line about which a body rotates
14. and instrument used to see far away
17. a big circular body tat moves in an elliptical orbit around a things