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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).
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 ...
The heat is generated by potential energy released by heavier materials sinking toward the core (planetary differentiation, the iron catastrophe) as well as decay of radioactive elements in the interior. The pattern of flow is organized by the rotation of the Earth and the presence of the solid inner core. [57]
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 ...
According to the Starwalk, the next planetary alignment will be visible on Feb. 28. There, stargazers will be able to view Saturn, Mercury, Neptune, Venus, Uranus, Jupiter and Mars in the evening.
The astrology of Jan. 21 brings the last quarter moon in Scorpio and the planetary conjunction of the sun and Pluto in Aquarius. January 21 is a time of release and letting go.
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 is arguably an example of a desert planet. Gas dwarf: A low-mass planet composed primarily of hydrogen ...
The best time to witness the solar event will be just after sunset or just before sunrise, and the best day is Sunday.