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