Across
- 2. warm rises and cool sinks
- 4. apparent shift
- 9. cooler areas on surface
- 11. collapsed core of high mass star
- 13. all new stars
- 14. collapsed neutron star no light escapes
- 16. cloud of gas and dust
- 17. squeezing atoms together
- 18. start of expansion
Down
- 1. the raisins spread apart as the berad rises
- 3. fusion of H2 and He
- 5. new stars in the arms, olds stars in the center
- 6. tells us galaxies are moving away
- 7. bright center of a distant galaxy
- 8. loop of gas
- 9. stream of charged particles
- 10. 9 trillion miles
- 12. hottest layer of atmosphere
- 15. all old stars