Funology - The Science of Having Fun!: Pluto

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Wednesday, December 15, 2004

Pluto - Eight Planet

Is Pluto the ninth planet or the eighth from the sun? The answer is both. For most of its 248 year orbit around the sun it is the ninth planet. But for 20 years of its long orbit, Pluto is actually closer than Neptune. From 1979 to early 1999, Pluto moved inside the orbit of Neptune and became the eighth planet!