مثال:
Thus, the results from StarPlan break with the traditional theory that the proto - Earth formed by random collisions between larger and larger planetary bodies throughout several tens of millions of years - - equivalent to about 5 - 15 minutes out of the above - mentioned fictional 24 hours of formation
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Over the course of 5 million years, the solar system's planets formed. According to the new study, the proto - Earth's iron core also formed during this time, snatching up accreted iron from the proto - planet's mantle. Eventually, this proto - planet became the Earth we know today.
Can you compare and contrast protoearth and modern earth? proto - Earth was a clump of chaotically mixed cosmic dust and gases. Modern Earth as consists of a number of superimposed layers/shells that differ in composition and properties. Modern Earth does not lose significant amounts of water to space.
The isotopic homogeneity of this highly refractory element suggests that lunar material was derived from the proto - Earth mantle, an origin that could be explained by efficient impact ejection, by an exchange of material between the Earth’s magma ocean and the proto - lunar disk, or by fission from a rapidly rotating post - impact Earth.
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