Across
- 1. A cloud of dust and gas that develops into a star
- 3. Relating to the cosmos or universe
- 6. A graph that plots the luminosity and temperature of stars
- 9. The transfer of thermal energy by electromagnetic waves
- 12. An invisible form of energy causing the universe to expand
- 15. All of space and everything in it
- 16. A galaxy that is looks like a circle or oval and doesn't have any internal structure
- 17. The universe began as a point and has continued to expand
Down
- 2. An explosion that destroys a star
- 4. A galaxy with a central bulge and extending arms
- 5. Leftover energy from the big bang (First letter of each word)
- 7. Shift to a different wavelength
- 8. Our sun is this kind of star
- 10. A galaxy with no specific shape or structure
- 11. A well-established explanation of a natural phenomenon
- 12. Invisible matter that doesn't emit any detectable energy of its own
- 13. A cloud of dust and gas
- 14. The galaxy we live in