The Milky Way

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Across
  1. 5. _____ A*: the black hole at the center of the Milky Way.
  2. 6. The round, flat portion of the galaxy that contains most of the stars.
  3. 7. The collection of ~134 galaxies that the Milky Way belongs to.
  4. 8. The type of galaxy the Milky Way is.
Down
  1. 1. A group of thousands to millions of ancient stars held together by each other's gravity.
  2. 2. Interstellar _____: The gas and dust that fills the space between stars in the galaxy.
  3. 3. The sparse spheroidal part of the galaxy that contains relatively few stars.
  4. 4. The dense group of stars located at the center of the galaxy.