The Solar System

5. Formulated three laws to accurately predict planetary motion
7. The ancient model of the universe with Earth at the center
9. The circular shaped movement around a celestial body
10. Large and gaseous planets with strong gravities
14. Wrote the book call 'The Revolutions', was credited with creating heliocentric theory
15. An object that appears to be slow down, stop, and back up
17. A meteoroid in Earth's atmosphere
18. A meteor that strikes the surface of Earth
19. Built precise instruments to measure the movement of celestial bodies and mentored Kepler
20. Very similar to planets, but, due to their size, share their orbits
21. Made of different ices that sublimate when it gets closer to the sun
22. Observed and studied various celestial bodies using the telescope

1. Comes from the Greek word planetos, meaning wanderer
2. Smallest asteroids in space - from the size of a grain of sand to 1 meter
3. The idea that the sun is the center of our solar system
4. Includes the sun and the objects that its gravity holds around it
6. a slightly flattened circle and the true shape of a planets orbit around the sun
8. Something in the solar system which is not a planet, moon, or dwarf planet
11. Rocky planets with densities similar to Earth
12. Studied the motions of the moon around Earth and developed a mathematical law to describe gravitational force
13. A natural satellite of a planet
16. The largest SSSB in the solar system