Science Vocab

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Across
  1. 4. explosion
  2. 5. interstellar
  3. 10. energy in it
  4. 12. all frequencies
Down
  1. 1. collection of different materials
  2. 2. brightness
  3. 3. how bright?
  4. 6. brightness of a star
  5. 7. Hertzprung-Russell diagram
  6. 8. hot star
  7. 9. collapsed
  8. 11. travel