UNIVERSE

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Across
  1. 3. The planet we live on
  2. 5. Study of universe
  3. 6. The home to many galaxies, including ours
  4. 7. Our galaxy
  5. 8. A model that represents the movements of galaxies in our universe
Down
  1. 1. Radiation as a result of the big bang
  2. 2. Start of the universe
  3. 4. The sun and the planets orbiting it