Space & Astronomy
How did Earth avoid falling in to the sun ?
By
T.K. RandallJanuary 9, 2010 ·
7 comments
Image Credit: NASA
Astronomers have determined how in its infancy the Earth managed to escape being incinerated from falling in to the sun.
A new modeal has demonstrated that some 4.6 billion years ago temperature differences in the space between Earth and the sun would have helped migrate Earth outwards and counteract the gravitational pull of the sun. When a balance was reached the Earth settled in to an orbit that has proven to be "just right" for supporting life.
Just how Earth survived the process of its birth without suffering an early demise by falling into the sun has been something of a mystery to astronomers, but a new model has figured out what protected our planet when it was still a vulnerable, baby world.
Source:
MSNBC |
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