Universe

1. All existing matter and space.
5. A group of billions of stars, gas, and dust held together by gravity
8. a non spherical body in space made most of chondrites and metal
10. The process by which the sun and other stars generate light and heat
11. the curved path of a celestial object around a star or planet
13. The belief that the sun is the center of the solar system.
14. The belief that the Earth is the center of the universe with the moon, sun, and planets revolving around it.
15. the study of the universe
17. our location within the Milky Way

2. The Earth spins on its axis to the east causing night and day. One of these takes 24 hours.
3. the planet we live on
4. a collection of planets that orbit a star
6. Time it takes the Earth to travel around the Sun
7. a natural satelitte that orbits the sun
9. a body made of rock, ice, and dust that orbits the sun
12. the name of the supercluster that out local galactic group is in
16. a luminous ball of gas held together by it's own gravity