Across
- 4. apparent shift
- 6. collapsed neutron star no light escapes
- 8. tells us galaxies are moving away
- 10. cloud of gas and dust
- 11. start of expansion
- 13. squeezing atoms together
- 14. warm rises, cool sinks
- 15. six trillion miles
Down
- 1. cooler areas on sun’s surface
- 2. bright center of a galaxy
- 3. fusion of H2 and HEE-HEE
- 5. hottest layer of atmosphere
- 6. the raisins move as bread expands
- 7. stream of charge particles
- 9. loop of gas
- 12. star collapsed core of a high mass star