Test of Newton's inverse-square law in the Greenland ice cap. (original) (raw)

ADS

;

• Zumberge, M. A. ;
• Lautzenhiser, T. ;
• Parker, R. L. ;
• Aiken, C. L. V. ;
• Gorman, M. R. ;
• Nieto, M. M. ;
• Cooper, A. P. R. ;
• Ferguson, J. F. ;
• Fisher, E. ;
• McMechan, G. A. ;
• Sasagawa, G. ;
• Stevenson, J. M. ;
• Backus, G. ;
• Chave, A. D. ;
• Greer, J. ;
• Hammer, P. ;
• Hansen, B. L. ;
• Hildebrand, J. A. ;
• Kelty, J. R. ;
• Sidles, C. ;
• Wirtz, J.

Abstract

An Airy-type geophysical experiment was conducted in a 2 km deep hole in the Greenland ice cap at depths between 213 and 1673 m to test for possible violations of Newton's inverse-square law. An anomalous gravity gradient was observed. The anomaly cannot unambiguously be attributed to a breakdown of Newtonian gravity because it might be due to unexpected geological features in the rock below the ice.

Publication:

Physical Review Letters

Pub Date:

February 1989

DOI:

10.1103/PhysRevLett.62.985

Bibcode:

1989PhRvL..62..985A

Keywords:

• Geophysics;
• Glaciers;
• Gravimetry;
• Land Ice;
• Newton Theory;
• Bedrock;
• Gravity Anomalies;
• Greenland;
• Geophysics;
• Gravitation Theory: Tests;
• 04.80.+z;
• 04.90.+e;
• 91.10.-v;
• 93.30.Kh;
• Other topics in general relativity and gravitation;
• Geodesy and gravity;
• Large islands