SCIENCE

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Across
  1. 1. clusters, are large groupings of older stars
  2. 4. binary, A system in which one star blocks the light from another periodically is called an
  3. 5. galaxies, look like round or flattened balls.
  4. 7. are active young galaxies with huge black holes at their centers.
  5. 8. galaxies, Somegalaxies appear to have a bulge in the middle and arms that spiral outward, like pinwheels.
Down
  1. 2. cluser , have a loose disorganized appearance
  2. 3. star, Star systems that have two stars are called double stars or
  3. 6. galaxies,Somegalaxies do not have regular shapes.