Across
- 4. It lies at the center of the solar system in the Geocentric Model.
- 6. One of the forces at work when our solar system formed.
- 9. The emission lines in a spectrum reveal these in a star.
- 10. The only star in our solar system: The _______.
- 12. Besides Hot temperatures it is needed to start fusion.
- 14. Device used to break down the light of a star.
- 16. The current stage of life our Sun is in.
- 18. Layer of the Sun where nuclear fusion takes place.
- 19. A collapsed star that leaves behind its strong gravity.
- 20. Planet with the Greenhouse Effect.
Down
- 1. One of the famous scientists who believed in the Heliocentric Model.
- 2. The only layer of the Sun we see on a regular basis.
- 3. Solar system model where the Earth is the center.
- 5. This directly determines the color of a star: _______ Temperature
- 7. Solar system model we believe today.
- 8. It lies between Mars and Jupiter.
- 11. Color of the hottest star.
- 13. A huge cloud of gas and dust where things form in space.
- 14. The color line created by a spectroscope.
- 15. Name of nebula that went on to create our solar system.
- 17. Area of science we are studying.