Science

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Across
  1. 5. how bright a star is
  2. 6. about 90% of stars are here
  3. 7. the horizontal line
  4. 10. a graphic representation for stars
Down
  1. 1. how hot or cool a star is
  2. 2. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  3. 3. the diagonal line
  4. 4. stars that have burned up all of the hydrogen they once used as nuclear fuel.
  5. 8. the most massive stars on the diagram
  6. 9. a luminous giant star of low or intermediate mass