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# Gravity fields of the terrestrial planets

- Kurt Lambeck
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One of the important forces operating in the solar system is gravity, the force of mutual attraction between masses such as planets and satellites or the mutual attraction between small mass elements of a planet. Newton's law of gravitation, ‘two particles attract each other with a central force in proportion to the product of their masses and inversely in proportion to the square of the distance between them,’ has been found to be largely adequate to explain most gravitation phenomena in the solar system, whether it is orbital motions or the mass distributions within planets. The proportionality constant of Newton's law *G*, is 6.670 × 10^{−11} N m^{2} kg^{−2}. An equivalent expression of Newton's law is in terms of the gravitational potential Φ, as the acceleration of gravity ** a**, imparted by gravity on a test particle according to

*V*the potential at a point P outside of

*V*is ...

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- Title
- Gravity fields of the terrestrial planets
- Reference Work Title
- Encyclopedia of Planetary Science
- Reference Work Part
- 7
- Pages
- pp 289-292
- Copyright
- 1997
- DOI
- 10.1007/1-4020-4520-4_162
- Print ISBN
- 978-0-412-06951-2
- Online ISBN
- 978-1-4020-4520-2
- Series Title
- Encyclopedia of Earth Science
- Series ISSN
- 1388-4360
- Publisher
- Springer Netherlands
- Copyright Holder
- Chapman & Hall
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