Astronomy MT 3

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Across
  1. 4. discovered the four main moons of Jupiter
  2. 8. magnitude is a measure of the amount of light a star actually gives off
  3. 9. a graph of the relationship between a star's absolute magnitude and temperature
  4. 11. star explosion
  5. 12. helium and what other gas make up the majority of the sun's composition
  6. 13. energy provider for the sun and other stars
  7. 15. large cloud of dust and gas that becomes a star
  8. 16. planet with the largest moon in the solar system
Down
  1. 1. a group of stars that form a pattern in the sky
  2. 2. when a star has no fuel left and its outer layers escape into space
  3. 3. third brightest astronomical object in the sky
  4. 4. a large group of stars, gas, & dust held together by gravity
  5. 5. type of galaxy the Milky Way is
  6. 6. nothing, including light, can escape from its gravity field
  7. 7. makes up about 90% of the stars
  8. 10. indicates the temperature and brightness of stars
  9. 14. along with white are the hottest, brightest stars