Comet Siding Spring to Skim Past Mars in 'Once in a Million Years' Encounter This Weekend

October 17, 2014 4:26 PM

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Comet Siding Spring to Skim Past Mars in 'Once in a Million Years' Encounter This Weekend

A once in a million years cosmic event will grace the heavens this weekend when a comet is expected to have a close encounter with Mars.

Comet Siding Spring will pass within 87,000 miles of the Red Planet on Sunday, Oct. 19 -- that's about one-third the distance between the Earth and the moon, according to NASA scientists.

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