Solar System

4. the name often given to the four inner planets.
6. smallest planet
8. a model of the universe in which Earth is at the center of the revolving planets and stars.
10. The name often give to the outer planets
12. an object that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit.
13. a region where many small objects orbit the the sun and that stretches from beyond the orbit of Neptune
14. hottest planet
16. blue and has clouds
18. region of the solar system between Mars and Jupiter
20. the system consisting of the Sun and the planets and other objects that revolve around it.

1. called the red planet
2. A thin disk of small ice and rock particles surrounding a planet.
3. the average distance between Earth and the Sun.
5. largest planet
7. not quite a circle, but an oval shape; the shape of the planet’s orbit.
9. an object that orbits a star and is large enough to have become rounded by it’s own gravity, and cleared the area of its orbit.
11. known for its rings
15. a model of the solar system in which Earth and the other planets revolve around the Sun.
17. coldest planet
19. planet with one moon