Solar system and space

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Across
  1. 3. system consists of the sun, planets, and the moon
  2. 4. when earth was thought to be the center of the solar system
  3. 6. belt region of the solar system between mars and jupiter
Down
  1. 1. effect when toxic gases get trapped in the atmosphere
  2. 2. rock and ice formed as a small body away from the sun
  3. 5. loose collecion of rock, ice, and dust particles
  4. 6. unit how distances within the solar system are measured