Across
- 3. warm rises cool sinks
- 7. squeezing atoms together
- 8. apparent shift
- 9. 6 trillion miles
- 11. full of dust,gas,and stars
- 13. collapsed neutron star no light escapes
- 16. old stars
- 18. the raisins spread apart as bread rises
Down
- 1. loop of gas
- 2. collapsed core neutron star no light escapes
- 4. one hole
- 5. bright center of a galaxy
- 6. tells us galaxies are moving away
- 10. fusion of H2 and He
- 12. start of expansion
- 14. stream of charged particles
- 15. hottest layer of atmosphere
- 17. cloud of gas and dust