STARS

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Across
  1. 5. a powerful and bright stellar explosion
  2. 7. a star's brightness
  3. 8. a scientist in the field of astronomy
  4. 9. the fuel of a main sequence
Down
  1. 1. a cloud of dust and gas
  2. 2. a hot ball of glowing gases
  3. 3. a very large, bright star
  4. 4. a group of stars
  5. 5. a medium-sized star
  6. 6. a picture that helps you understand the written description