Humongous Comet to Have Close Shave With Mars (Video)

Hurtling at about 126,000 mph, a comet with a center core a mile wide will have a close encounter with Mars on Oct.19.

The ‘Siding Spring’ comet will come within 88,000 miles of the Red Planet, which NASA says is less than half the distance between Earth and our moon and less than one-tenth the distance of any known comet flyby of Earth.

It’s an event that NASA says is a once-in-a-million-years encounter.

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