Across
- 1. supposedly the start of expansion
- 3. squeezing atoms together
- 7. fusion of H and He
- 10. bright center of distant galaxies
- 13. apparent shift
- 14. stream of charged particles
- 15. warm goes up cool goes down
- 16. 9 trillion miles
Down
- 1. raisins spread apart as the bread dough rises
- 2. hottest layer of atmosphere
- 4. no shape to the galaxy
- 5. cloud of gas and dust
- 6. collapsed core of a high mass star
- 8. oval shaped galaxies
- 9. loop of gas
- 11. collapsed neutron star, no light escapes
- 12. cooler area on surface
- 14. spiral shaped galaxies