space

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Across
  1. 4. Earth Mars Saturn
  2. 5. small as grains of sand
  3. 6. the 4th planet from the sun
  4. 8. not perfectly round
  5. 9. It is a nearly perfect ball of hot plasma
Down
  1. 1. the fifth in distance from the Sun
  2. 2. huge celestial bodies made mostly of hydrogen
  3. 3. four times wider than Earth
  4. 6. rocks from space
  5. 7. first planet to be discovered through a telescope