Star Systems and Galaxies

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Across
  1. 2. person who studies the universe
  2. 4. our home galaxy
  3. 5. a few thousand stars loosely scattered
  4. 6. two stars that orbit each other
  5. 9. round, old stars clumped together, flat
  6. 10. stars, gas, dust, all held together by gravity
  7. 11. burning ball of gas
Down
  1. 1. millions of stars densely packed;round
  2. 3. one star passes in front of another
  3. 7. smaller galaxy, lots of gas and dust, no shape
  4. 8. arms of newer stars; center bulge