Physics

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Across
  1. 4. Orbits the planet and reflects light from st
  2. 6. Pluto is one of these
  3. 7. large object that orbits a star
  4. 8. Earth is in the Milky Way
Down
  1. 1. One of the gas giants
  2. 2. In the olden times they could be believed as
  3. 3. The Sun is an example of this
  4. 5. a unit of measurement used to measure light