Science

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Across
  1. 2. also known as brightness
  2. 4. a galaxy with a bulge in the center and has arms
  3. 6. a celestial body consisting of a mass of gas and is held together by its own gravity
  4. 8. A plot of the surfaces temperature (color)of stars vs.their luminosity
  5. 9. nothing light cannot escape its pull
  6. 10. large cloud of gas and dust and is where stars are formed
Down
  1. 1. has no shape no internal structure and has no spiral arms and very little dust or gas
  2. 3. a galaxy that does not fit into any category
  3. 5. a large grouping of stars in space
  4. 7. sequence category of stable stars in the middle development phases, that plot along a continuous diagonal belt