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The layers of the Earth, a differentiated planetary body. In planetary science, planetary differentiation is the process by which the chemical elements of a planetary body accumulate in different areas of that body, due to their physical or chemical behavior (e.g. density and chemical affinities).
The rain-out model is a model of planetary science that 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 ...
A theoretical planet that has undergone planetary differentiation but has no metallic core. Not to be confused with the Hollow Earth concept. Desert planet: A terrestrial planet with an arid surface consistency similar to Earth's deserts. Mars: Gas dwarf: A low-mass planet composed primarily of hydrogen and helium. GJ 1214 b: Gas giant
A major source of differentiation is fractionation, an unequal distribution of elements and isotopes. This can be the result of chemical reactions, phase changes, kinetic effects, or radioactivity. [1]: 2–3 On the largest scale, planetary differentiation is a physical and chemical separation of a planet into chemically distinct regions. For ...
Double planet – A binary system where two planetary-mass objects share an orbital axis external to both; List of landings on extraterrestrial bodies; Lists of planets – A list of lists of planets sorted by diverse attributes; Mesoplanet – Planetary objects that have a mass smaller than Mercury but larger than Ceres
Following the increasing of Internet usage in Vietnam, many online encyclopedias were published. The two largest online Vietnamese-language encyclopedias are Từ điển bách khoa toàn thư Việt Nam, a state encyclopedia, and Vietnamese Wikipedia, a project of the Wikimedia Foundation.
Hypotheses do not predict a merger stage, due to the low probability of collisions between planetary embryos in the outer part of planetary systems. [65] An additional difference is the composition of the planetesimals , which in the case of giant planets form beyond the so-called frost line and consist mainly of ice—the ice to rock ratio is ...
I am proposing to merge core-mantle differentiation into this article since core-mantle differentiation is essentially the same as planetary differentiation (or at the very least a subset of it) and much of the information is, or at least should be, common between the two. Core-mantle differentiation is the better written/more complete article ...