Across
- 2. hot dim stars on the HR diagram
- 5. the densest stellar remnant
- 6. spectrum produced by hot gas
- 8. a hot gas composed of electrically charged hydrogen and helium
- 12. study of wavelengths of light
- 18. most explosive events on the sun
- 20. shape of our galaxy
- 21. 90% of stars are in this group
- 22. our Sun in 5 billion year
- 23. giant cloud of particles hurled from the sun
- 24. caused by the solar wind interacting with the earth's upper mantle
- 25. our galaxy
Down
- 1. source of the sun's energy
- 3. indicates that an object is moving away from us
- 4. stellar nursery
- 5. widely accepted theory of the origin of the universe
- 7. a measure of a star's brightness
- 8. surface layer of the sun, just below the chromosphere
- 9. the apparent change in wavelength caused by an object's relative motion
- 10. created when a proton combines with an electron
- 11. outermost portion of the solar atmosphere
- 13. exploding star
- 14. star fuel
- 15. refers to things relating to stars
- 16. 3.26 light years
- 17. galaxies are receding from us at a speed that is proportional to their distance from us
- 18. wavelengths that have high energy
- 19. graph of absolute magnitude and the color of stars