Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Mapping science

equilibrium argument

Earth science; Mapping science

The theoretical phase of a constituent of the equilibrium tide. It is usually represented as the sum of two angles V and u, in which V is a uniformly and rapidly changing angle ...

end standard of length

Earth science; Mapping science

A bar or block whose ends or sides are flat and contain a defined or otherwise known length between them. The ends are usually optically flat (i.e., flat to within a fraction of ...

geostrophic equation

Earth science; Mapping science

An equation which represents a balance between the horizontal difference of pressure, in a fluid, and the Coriolis force per unit area. The equation used to compute the speed of ...

astrometric ephemeris

Earth science; Mapping science

An ephemeris, of a celestial body in the Solar System, in which the tabulated positions are directly comparable to the mean places of stars listed in catalogs for some standard ...

egress

Earth science; Mapping science

(1) The act or right of going from a place of real or seeming confinement. (2) A place or means of exit; an outlet. (3) The emergence of a celestial body from eclipse, ...