planets

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Across
  1. 5. why is mars red in color?
  2. 6. what dwarf planet was considered a planet till 2006?
Down
  1. 1. why does the earth appear green from the sky?
  2. 2. what is the red dot on Jupiter?
  3. 3. how many rings are there around Uranus?
  4. 4. what is the hottest planet?