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Planetary science

The scientific study of planets including Earth, moons, and planetary systems of the Solar System in particular and the processes that form them.

Contributors in Planetary science

Planetary science

magnesium number

Astronomy; Planetary science

The ratio of magnesium to iron, usually reported as the molar ratio Mg/(Mg+Fe), and abbreviated as Mg# or Mg' or Mg*. This value is used commonly to discriminate between lunar rock types.

lunar cataclysm

Astronomy; Planetary science

Term referring to the idea that a sharp increase in impact bombardment rate between about 3. 92 and 3. 85 billion years ago affected the inner Solar System--most notably recorded in the numerous ...

reflectance spectroscopy

Astronomy; Planetary science

The study of light as a function of wavelength that has been reflected or scattered from a solid, liquid, or gas. Also see spectroscopy.

vesta

Astronomy; Planetary science

The brightest of the known asteroids. Also called 4 Vesta because it was the fourth asteroid to be discovered (by Olbers in 1807).

mantle

Astronomy; Planetary science

A mostly solid layer of Earth lying beneath the crust and above the core; consisting mostly of iron, magnesium, silicon, and oxygen. On other planets and moons, the mantle is the layer between the ...

subduction

Astronomy; Planetary science

The process describing when one lithospheric plate collides with and is overridden by, or descends under, an adjacent plate.

breccia

Astronomy; Planetary science

Consolidated, fragmental rock consisting of rock, mineral, or glass fragments (also called clasts) embedded in a fine-grained matrix. (See also monomict and polymict. )

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