Across
- 1. theory that life in our galaxy started with an explosion
- 5. spinning on an axis
- 7. rocks and dust collected in space that entered earth's atmosphere
- 9. galaxy of stars
- 12. discovered the geocentric system
- 16. orbiting around something for a certain amount of time
- 18. the force of which how strong the attraction is
Down
- 2. Incorrect model that shows all the planets orbit around earth
- 3. how the earth is facing the sun determines the seasons
- 4. Correct model that shows all the planets orbit around the sun
- 6. the galaxy we live in
- 8. a different side of earth will be pointed to the sun each day
- 10. A place located in the galaxy where there are many different planets and species
- 11. chunks of rock and metal found in the solar system
- 13. creator of the heliocentric model
- 14. chunks of ice and dust that orbit around the sun
- 15. going around something
- 17. Rocks or dust collected in space