Astronomy

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Across
  1. 3. the mass of the sun used as a unit of mass
  2. 8. has life
  3. 9. it has 8 phases each month
  4. 10. Luminosity of 1
  5. 11. are celestial bodies made of hot gases, mainly hydrogen and some helium.
  6. 12. Nebula used to explain the formation of the sun
  7. 13. of stars red supergiant creates black hole and red giant creates black dwarf
Down
  1. 1. is sometimes called the red planet
  2. 2. a very young star
  3. 4. total energy produced by a star each second
  4. 5. Fusion is the process of energy production in which hydrogen nuclei combine to form helium nuclei.
  5. 6. The hottest planet in our solar system
  6. 7. Blue, Red, and yellow determine its temperature