Rain-out Model
978-613-2-43823-2
6132438238
176
2010-10-23
54,00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The rain-out model is a model of planetary science which describes the first stage of planetary differentiation and core formation. According to this model, a planetary body is assumed to be composed primarily of silicate minerals and NiFe (i.e. a mixture of nickel and iron). If temperatures within this body reach about 1500 K, the minerals and the metals will melt. This will produce an emulsion in which globules of liquid NiFe are dispersed in a magma of liquid silicates, the two being immiscible. Because the NiFe globules are denser than the silicates, they will sink under the influence of gravity to the centre of the planetary body–in effect, the globules of metal will "rain out" from the emulsion to the centre, forming a core.
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Physik, Astronomie
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