The solar sistem

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Across
  1. 3. are similar to asteroids, but are made of ice, dust and rocky material
  2. 5. are made of metals and rocky material
  3. 7. one of eight planets in the solar system
Down
  1. 1. a dwarf planet
  2. 2. A body orbiting a planet
  3. 4. the temperature ... from Mercury to Neptune
  4. 6. the largest object in the solar system