The solar system

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Across
  1. 2. who first stepped on the moon
  2. 5. gravity keeps what orbiting around the earth
  3. 6. what dwarf planet is bigger than Pluto
  4. 7. how long does it take the earth to have a complete orbit
Down
  1. 1. what is a common dwarf planet
  2. 3. keeps earth in orbit around the sun
  3. 4. all objects with what have gravity
  4. 5. what planet is closest to the sun