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