Across
- 1. refers to sun
- 5. is the theory that says the sun as the center of the system
- 6. a star that is in the center of the solar system
- 7. was the Greek philosopher who believed that the earth was the center of the universe
- 8. appear dark on the sun's surface because of low temperatures
Down
- 1. sudden burts of brightness
- 2. a Polish cleric who was the first one who proposed that the sun is the center of the system
- 3. composes the sun, planets, asteroids, comets and all other heavenly bodies that revolve around the sun
- 4. was theory that philosophers believed in which the earth was the center of the universe