Across
- 2. Loop of gases
- 3. Cooler areas on surface
- 6. apparent shift
- 11. Collapsed core and high mass
- 12. Small galaxies
- 13. Warm rises and cool sinks
- 15. Cloud of gas and dust
- 17. Hottest layer of atmosphere
- 18. The raisins spread apart as the bread rises
Down
- 1. Squeezing atoms together
- 3. Stream of charged particles
- 4. Fusion of H2 and He
- 5. Collapsed neutron star no light escapes
- 7. Old stars in middle, young stars in arms
- 8. Tells us galaxies are moving away
- 9. Bright center of a distant galaxy
- 10. 6 trillion miles
- 14. All old stars
- 16. Start of expansion