Vertical and horizontal
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In astronomy, geography and related sciences, a line or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. Conversely, a line or plane is s
A plumb bob
Gravity of Earth
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The gravity of Earth, denoted by g, is the net acceleration that is imparted to objects due to the combined effect of gravitation and the centrifugal force. It is a vector quantity, whose direction co
Vertical and horizontal
…In astronomy, geography and related sciences, a line or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. Conversely, a line or plane is said to be horizontal (or leveled) if it is perpendicular to the vertical at a given point. By extension…
Earth's gravity measured by NASA GRACE mission, showing deviations from the theoretical gravity of an idealized, smooth Earth ellipsoid. The deviations toward stronger gravity are colored red; deviations toward weaker gravity are colored blue.
Earth's radial density distribution according to the Preliminary Reference Earth Model (PREM).