Season 33 Episodes13
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Pluto is the smallest of the planets, and also one of the most puzzling. It is so far from the sun that it takes almost 248 years to complete one orbit; it is made up of a mixture of rock and ice; it has an
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"The Curious Little World of Pluto" is episode 7 of The Sky at Night season 33. It aired on July 2, 1989.