Across
- 2. hottest layer of atmosphere
- 5. tells us galaxies are moving away
- 7. bright center of a distant galaxy
- 9. collapsed neutron star no light can escape
- 10. stream of changed particles
- 11. young stars in the ams old stares in the center
- 13. fusion of H2 and He
- 16. 6 trillion miles away
- 17. apparent shift
Down
- 1. cooler areas on the surface
- 3. the raisins spread apart as the bread rises
- 4. cloud of gas and dust
- 6. squeezing atoms together
- 8. loop of gas
- 9. start of expansion
- 12. warm rises cool sinks
- 14. collapsed core of a high mass star
- 15. ovial and old stars