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Number of Planets

How many planets are there?

429.

According to the Extrasolar Planets Encyclopaedia, there are 429 planets detected as of February 2010. Among these, 14 were discovered from January to February 2010 alone. These planets range in size from twice the size of Jupiter to one-one hundredths the size of Earth.

This fact is verified on : February 6, 2010.





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