Earth and its Neighbors

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Across
  1. 1. planets that move around the sun
  2. 3. the study of stars and planets
  3. 5. how much of something there is
  4. 7. a sphere or a model of earth
  5. 8. to feel the heat
Down
  1. 2. outside of something
  2. 4. to provide what someone needs
  3. 6. how hot or cold anything is