Across
- 2. cooler areas on surface
- 7. squeezing atoms together
- 10. start of expansion
- 11. oval shaped
- 13. apparent shift
- 14. 9 trillion miles
- 15. stream of charged particles
- 16. collapsed core of a high mass star
- 18. tells us galaxies are moving away
- 19. warm rises cool sinks
Down
- 1. the raisins spread apart as the bread rises
- 3. loop of gas
- 4. spiral shaped
- 5. bright center of a distant galaxy
- 6. no shape
- 8. cloud of gas and dust
- 9. collapsed neutron star, no light escapes
- 12. fusion of h2 and he
- 17. hottest layer of atmosphere