Across
- 2. Star at the center of our solar system
- 5. Italian Astronomer who confirmed heliocentrism with a telescope
- 6. Formed from clumps of dust and gas orbiting the sun
- 7. The Sun is about this far through its supply of hydrogen
- 8. Astronomer who described the laws of planetary motion
- 9. Polish Astronomer who supported heliocentrism
- 10. This part of the sun is about 27 million degrees Farenheit
- 11. Scientist who described the law of gravity
- 13. The shape of each planet's orbit
Down
- 1. Process that powers the sun and other stars
- 3. The Sun accounts for 98% of this in the solar system
- 4. Belief that the sun is the center of the universe
- 12. Tool Galileo used to observe the skies