Astronomy & Space
Intermediate

Surface Gravity

Gravitational acceleration at a body surface.

Formula

g=GMr2g = \frac{GM}{r^2}

Variables

GConstant
MMass
rRadius

Example

Moon: 1.62 m/s²

Did You Know?

Escape velocity from the Sun's surface is about 618 km/s, over fifty times Earth's.

gravity

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Minimum speed to escape a body's gravity.

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Speed of a circular orbit.

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Event horizon radius of a black hole.

Hubble's Law

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Stefan–Boltzmann Law

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Luminosity of a star from radius and temperature.