One of the best meteor showers of the year - the Geminids - are about to peak. If you've got clear skies, head out on the evening of December 13th, and you could see a few meteors an hour. Unlike most meteor showers, the source of the Geminids is a bit of a mystery, since the dust doesn't seem to originate from a comet. A small asteroid called 3200 Phaethon has been discovered in the right orbit, but astronomers aren't sure how it could be generating enough dust to cause such beautiful meteor showers.

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