Across
- 2. British scientist and astronomer
- 3. Scottish chemist found helium in the mineral uraninite and verified that that it had the same spectrum as the element Lockyer observed on the Sun
- 6. who rode his golden chariot across the sky daily and disappeared beneath the waves at night
- 8. grew up around the sun
- 9. built over a period of 1500 years by three separate cultures
- 10. giver of light, warmth, and life
- 11. discovered on the Sun before it was found on Earth
- 14. the nuclei fuse directly in
- 15. spent a great deal of time trying to understand the nature of the Sun
- 16. showed that the pathway proposed by Bethe actually did not occur to a significant extent in the Sun's core
- 18. keeps the stars volume fairly constant
- 19. reveal that the Sun is made up of hydrogen and helium with the remainder being only a smattering of other elements
Down
- 1. amount of radiant energy reaching the Earth's atmosphere per unit area per second
- 2. the nuclei of hydrogen atoms begin to join or fuse together to form the nuclei of heavier elements
- 4. German-American physicist, Nobel Prize winner
- 5. proposed that the Sun was powered by the conversion of gravitational energy into heat as it collapsed upon itself under its own weight
- 7. a fusion reactor that is stabilized by gravity
- 12. described as pretty much as the Greek's Helios
- 13. causes heat and pressure to build up
- 17. a Greek philosopher born about 500BC