Space System

2. everything that exsists in space
4. electromagnetic radiation
5. a small object that orbits a big object
6. lumps of ice , dust, and rock that circle the sun
8. this is a sphere made of mostly icy material
10. a small planet
15. modeled the model in which earth and planets revolve around he sun at the center
19. lines up all electromagnetic based on their wavelengths
21. the science that deals with the universe

1. the calendar that we use today that was invented in 1582 by Jullian Calander
3. where are planets are
7. traveling around another object
9. and instrument used to see far away
11. a unit of measurement that measures the distance that light travels in a year
12. a big circular body tat moves in an elliptical orbit around a things
13. a large natural body that travels around the earth
14. the idea that the universe began with an explosion
16. a measure of the amount of matter in objects
17. an imaginary line about which a body rotates
18. a number used to multiply one object to get another
20. an object in the night's sky that lights up and moves