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Space & Astronomy

How did Earth avoid falling in to the sun ?

By T.K. Randall
January 9, 2010 · Comment icon 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 | Comments (7)




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Recent comments on this story
Comment icon #1 Posted by www375 16 years ago
GPS? Anyone??...anyone??.............
Comment icon #2 Posted by Kensei 16 years ago
The whole planetary accretion theory is bunk. Planets are not formed by slow accretion of dust. If they were, the asteroids would accrete into a planet. They don't. Planets are formed entire as droplets in hypernova explosions. They are modified by moderate accretion (meteors and cometary impacts), but they are formed in the main in instantaneous blasts. You can see this in photos of hypernovae where planetary sized 'comets' are hurled out from the heavy-element forming explosion by the thousands in all directions. The Earth and Sun and other solar system objects 'captured' each other, each ob... [More]
Comment icon #3 Posted by Waspie_Dwarf 16 years ago
The whole planetary accretion theory is bunk. Planets are not formed by slow accretion of dust. And your evidence for this is? If they were, the asteroids would accrete into a planet. They don't. The reason they don't is very well understood, it is because of gravitational interactions with Jupiter. Planets are formed entire as droplets in hypernova explosions. They are modified by moderate accretion (meteors and cometary impacts), but they are formed in the main in instantaneous blasts. You can see this in photos of hypernovae where planetary sized 'comets' are hurled out from the heavy-eleme... [More]
Comment icon #4 Posted by purplepanzer 16 years ago
The whole planetary accretion theory is bunk. Planets are not formed by slow accretion of dust. If they were, the asteroids would accrete into a planet. They don't. Planets are formed entire as droplets in hypernova explosions. They are modified by moderate accretion (meteors and cometary impacts), but they are formed in the main in instantaneous blasts. You can see this in photos of hypernovae where planetary sized 'comets' are hurled out from the heavy-element forming explosion by the thousands in all directions. The Earth and Sun and other solar system objects 'captured' each other, each ob... [More]
Comment icon #5 Posted by MID 16 years ago
The whole planetary accretion theory is bunk. Planets are not formed by slow accretion of dust. If they were, the asteroids would accrete into a planet. They don't. Planets are formed entire as droplets in hypernova explosions. They are modified by moderate accretion (meteors and cometary impacts), but they are formed in the main in instantaneous blasts. You can see this in photos of hypernovae where planetary sized 'comets' are hurled out from the heavy-element forming explosion by the thousands in all directions. The Earth and Sun and other solar system objects 'captured' each other, each ob... [More]
Comment icon #6 Posted by Waspie_Dwarf 16 years ago
That's a new one... Why do I suspect that we will be waiting a very long time for Kensei to back this up with some actual evidence?
Comment icon #7 Posted by MID 16 years ago
Why do I suspect that we will be waiting a very long time for Kensei to back this up with some actual evidence? Don't know Waspie... I can't imagine for the life of me why you'd think such a thing! ...as he sneaks off to hibernate for the winter.


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