Across
- 4. stream of charged particles
- 5. loop of gas
- 6. Hottest layer of atmosphere
- 9. start of expansion
- 10. cooler areas on surface
- 12. all new stars
- 13. Collapsed neutron star, no light escapes
- 14. Bright center of a distant galaxy
- 15. all old stars
- 17. tells us galaxies are moving away
Down
- 1. squeezing atoms together
- 2. apparent shift
- 3. Collapsed core of a high mass star
- 7. Cloud of gas and dust
- 8. 6 trillion miles
- 10. Young stars in its arms old in the center
- 11. Warm rises, cool sinks
- 13. the raisins spread apart as the bread rises
- 16. Fusion of H2 and HE