The Sun

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Across
  1. 4. A small, cool star with low luminosity
  2. 6. A cloud of gas and dust from which stars are formed
  3. 9. The second most abundant element in stars
  4. 10. A hot, massive star with a blue hue
  5. 11. A sudden and powerful explosion of a star
  6. 12. A star with a reddish hue
  7. 13. The primary fuel of stars for fusion
  8. 14. An extremely dense region in space with gravity so strong even light cannot escape
  9. 15. A dense stellar remnant composed mostly of neutrons
Down
  1. 1. An extremely large star with very high luminosity
  2. 2. The expanding shell of gas ejected from a dying star
  3. 3. The apparent shift in position of a star due to Earth’s movement
  4. 5. A star with a yellow color, like our sun
  5. 7. The total amount of energy emitted by a star per second
  6. 8. The process by which stars convert hydrogen into helium, releasing energy
  7. 14. A failed star that does not sustain nuclear fusion