COMPONENTS OF THE UNIVERSE

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Across
  1. 2. all of space and the matter the space contains
  2. 3. death of a large star by explosion
  3. 8. power that fuels the sun and the stars
  4. 9. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
  5. 10. stellar body consists of a mass of gas held by gravity
Down
  1. 1. category of stable stars in the middle development phases that plot along a continuous diagonal belt on the H-R Diagram
  2. 4. large cloud of gas and dust in interstellar space
  3. 5. plot of the surface temperature of stars vs. their luminosities
  4. 6. remains of a star
  5. 7. intensity or brightness of light from a celestial body