Bound on the Secular Variation of the Gravitational Interaction

  • R. D. Reasenberg
  • I. I. Shapiro


Analysis of several thousand radar observations of the inner planets, spanning the period from 1966 through 1975, discloses no significant change with (atomic) time of the gravitational constant, G. Consideration of this result in combination with those of lunar and other planetary data leads to the (one-standard-deviation) bound
$$ \left| {\frac{{\dot G}}{G}} \right| < {10^{ - 10}}y{r^{ - 1}}. $$
Continued radar observations appear to offer the best hope for a significant improvement in this bound.


Gravitational Constant Secular Variation Gravitational Interaction Radar Observation Atomic Time 


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Copyright information

© Springer Science+Business Media New York 1976

Authors and Affiliations

  • R. D. Reasenberg
    • 1
  • I. I. Shapiro
    • 1
  1. 1.Massachusetts Institute of TechnologyCambridgeUSA

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