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'Dark' Comets Could Hit Earth Without Warning

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Seadubb
User ID: 534986

United States
2/12/2009 8:36 PM

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'Dark' Comets Could Hit Earth Without Warning

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Hazardous comets and asteroids are tracked by various space agencies, but British-based astronomers say there are many dangerous ones still going undetected, New Scientist magazine reported.

Previous research suggests comets nudge in the Earth's direction when the solar system periodically passes through the galactic plane.

These comets appear to coincide with the dates of ancient impact craters found on Earth — suggesting they were caused by comets and not asteroids.

"There is a case to be made that dark, dormant comets are a significant but largely unseen hazard," said Bill Napier at Cardiff University.

Napier and David Asher, at Armagh Observatory, say dark comets may still be in the solar system, and could come near Earth.

Dark comets happen when a comet's reflective water ice evaporates away, and leaves behind an organic crust.

Since the water's gone, they don't reflect light, making it hard for astronomers to see them until they're right on top of us.

Anonymous Coward
User ID: 613786

Portugal
2/12/2009 8:37 PM

Re: 'Dark' Comets Could Hit Earth Without Warning	Quote
old news: foxnews

Seadubb
User ID: 534986

United States
2/12/2009 8:39 PM

Re: 'Dark' Comets Could Hit Earth Without Warning	Quote
old news: foxnews Quoting: Anonymous Coward 613786 What a LOSER AC...it's old news...UNTIL IT IS RIGHT ON TOP OF YOU!! That's like saying "I don't worry about bears (Anchorage); because my Daddy saw one once and didn't die" ...???!!???

falldown
User ID: 520470

United States
2/12/2009 8:39 PM

Re: 'Dark' Comets Could Hit Earth Without Warning	Quote
I worry about that whole area of sky above and below the solar system's plane that we're not looking for comets or anythign else in. Now we've got to worry about "stealth" comets, too?!! ~ ~ "He who does not understand your silence will probably not understand your words." ~Elbert Hubbard

Seadubb
User ID: 534986

United States
2/12/2009 8:42 PM

Re: 'Dark' Comets Could Hit Earth Without Warning	Quote
I worry about that whole area of sky above and below the solar system's plane that we're not looking for comets or anythign else in. Now we've got to worry about "stealth" comets, too?!! Quoting: falldown EXACTLY! It's like having tunnel vision and barely any neck movement; we don't even have the ability to scan / attempt to see most of the vast area to see an oncoming "DARK" COMET

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