A comet is streaking back our way after 50,000 years
The dirty snowball last visited during Neanderthal times, according to NASA. It will come within 26 million miles of Earth Wednesday before speeding away again, unlikely to return for millions of years.Discovered less than a year ago, this harmless green comet already is visible in the northern night sky with binoculars and small telescopes, and possibly the naked eye in the darkest corners of the Northern Hemisphere.
On Wednesday, it will hurtle between the orbits of Earth and Mars at a relative speed of 128,500 mph . Its nucleus is thought to be about a mile across, with its tails extending millions of miles . But"it will be bright by virtue of its close Earth passage ... which allows scientists to do more experiments and the public to be able to see a beautiful comet,” University of Hawaii astronomer Karen Meech said in an email.
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