Our Sun and Beyond

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