Across
- 5. cloud of gas and dust
- 7. effect tells us galaxies are moving away
- 9. warm rises cool sinks
- 12. hottest layer of atmosphere
- 13. apparent shift
- 15. bright center of a distant galaxy
Down
- 1. loop of gas
- 2. cooler areas on surface
- 3. sequence fusion ofh2 and he
- 4. squeezing atoms together
- 5. star collapsed core of a high mass star
- 6. wind stream of charged particles
- 8. 6 trillion miles
- 10. dough theory the raisins spread apart as the bread rises
- 11. hole collapsed neutron star no light escapes
- 14. start of expansion