Non-Newtonian gravitational forces and the Greenland ice-sheet experiment

The results of an experiment to test Newton's Inverse-Square Law of Gravitation in the Greenland ice-cap were announced recently. The anomalous gravity gradient which was found can be explained either by an unrecognized anomaly in the density of the rocks under the ice sheet, or by the existenc...

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Bibliographic Details
Main Authors: Hughes, R.J., Goldman, T., Nieto, M.M.
Format: Article in Journal/Newspaper
Language:English
Published: Los Alamos National Laboratory 1989
Subjects:
Greenland
Testing
Measuring Methods
Earth Planet
Planets 657003* > Theoretical & Mathematical Physics > Relativity & Gravitation
71 Classical And Quantum Mechanics
General Physics
Gravitation
Ice cap
Ice Sheet
Online Access:https://digital.library.unt.edu/ark:/67531/metadc1111924/
Description
Summary:The results of an experiment to test Newton's Inverse-Square Law of Gravitation in the Greenland ice-cap were announced recently. The anomalous gravity gradient which was found can be explained either by an unrecognized anomaly in the density of the rocks under the ice sheet, or by the existence of a non-Newtonian component of the gravitational force. Here we focus on the latter possibility, and find that the force would be attractive, with a strength between about 2.4% and 3.5% that of Newtonian gravity, and a range between about 225 m and 5.4 km. 11 refs.

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