Saturday, April 21, 2012

Was Earth a Migratory Planet?

Was Earth a Migratory Planet?
April 18, 2012 7:17 PM
by samzenpus

Was Earth a Migratory Planet?

astroengine writes "Why our planet isn't a "snowball Earth" — a dilemma called the 'faint young sun paradox' — has foxed solar and planetary scientists for decades. Since the Earth's formation, a planet covered in ice should have stifled any kind of greenhouse effect, preventing our atmosphere from warming up and maintaining water in a liquid state. Now, David Minton of Purdue University has come up with a novel solution that, by his own admission, straddles science fact and fiction. Perhaps Earth evolved closer to the Sun and through some gravitational effect, it was pushed to a higher orbit as the Sun grew hotter. But watch out, if this is true, planetary chaos awaits."

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Dr. Art Trembanis
Associate Professor
109 Penny Hall
Department of Geological Sciences
The College of Earth, Ocean, and Environment
University of Delaware
Newark DE 19716
"We shall not cease from exploration. And the end of all our exploring will be to arrive where we started and know the place for the first time."
-T. S. Eliot, Little Gidding

"Il faut aller voir" -JYC

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