Across
- 5. start of expansion
- 8. fusion of h2 and hE
- 11. tells us galaxies are moving away
- 12. apparent shift
- 15. stream of charged particles
- 16. loop of gas
- 18. 1 trillion miles
Down
- 1. young stars in the arms
- 2. warm rises, cool sinks
- 3. collapsed neutron star no light escapes
- 4. cooler areas on the surface
- 6. hottest layer of an atmosphere
- 7. collapsed core of a high mass star
- 9. full of old stars
- 10. cloud of gas and dust
- 13. squeezing atoms together
- 14. the rasins spread apart as the bread rise
- 17. bright center of a distant galaxy