
The Green Comet will be closest to earth on Feb 1. Here's the science behind its ghoulish glow.
A comet is essentially a galactic snowball. Physics explains why the green comet's head is green, but not its tail.
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A comet is essentially a galactic snowball. Physics explains why the green comet's head is green, but not its tail.
Full ArticleWatch VideoIt’s a celestial visitor that hasn’t passed through since Neanderthals walked the Earth.
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