Across
- 7. What is the term for how bright a star actually is?
- 9. What determines the temperature of a star?
- 11. What stage of life is our Sun in?
- 13. What does a massive star become after its main sequence?
- 14. What determines the life cycle of a star?
- 15. The ________ bread model is a model that describes the expansion of the universe.
Down
- 1. What is the term for how bright a star appears?
- 2. Where are all stars born?
- 3. What is the main theory for how the universe began?
- 4. What type of shift describes something moving towards the observer?
- 5. What types of shift describes something moving away from the observer?
- 6. What is it called when atoms combine to form new elements?
- 8. What is another word for a star's brightness?
- 10. How many years old is the universe?
- 12. The universe is always __________