Stars

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Across
  1. 5. about the size of earth but about a million times more dense than the sun
  2. 7. a group of single stars
  3. 8. the first stage of a stars formation
  4. 9. has all of space and everything in it
  5. 11. the universe formed in an instant billions of years ago by an explosion
  6. 12. the brightness if the star were a standard distance from earth
Down
  1. 1. the distance that light travels in one year
  2. 2. material from the star that expands into space
  3. 3. to look at or study
  4. 4. the brightness seen from earth
  5. 6. a scientific conclusion
  6. 10. large cloud of gas and dust containing an immense volume of material.