# Measurements of Newton's gravitational constant and the length of day

@article{Anderson2015MeasurementsON, title={Measurements of Newton's gravitational constant and the length of day}, author={J. D. Anderson and G. Schubert and Vl Trimble and Michael R Feldman}, journal={Europhysics Letters}, year={2015}, volume={110} }

About a dozen measurements of Newton's gravitational constant, G, since 1962 have yielded values that differ by far more than their reported random plus systematic errors. We find that these values for G are oscillatory in nature, with a period of , an amplitude of , and mean-value crossings in 1994 and 1997. However, we do not suggest that G is actually varying by this much, this quickly, but instead that something in the measurement process varies. Of other recently reported results, to the…

## 76 Citations

### Does Newton’s gravitational constant vary sinusoidally with time? Orbital motions say no

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A sinusoidally time-varying pattern of the values of Newton’s constant of gravitation G measured in Earth-based laboratories over the last few decades has been recently reported in the literature. We…

### Variation of Newton's Constant and of Length of Day

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J.D. Anderson et al have published an article discussing the observations suggesting a periodic variation of the measured value of Newton constant and variation of length of day (LOD). In the…

### Comment on “Measurements of Newton's gravitational constant and the length of day” by Anderson J. D. et al.

- Physics
- 2015

There have been recent claims (Anderson et al., EPL, 110, 10002) of a 5.9 year periodicity in measurements of Newton's gravitational constant, $G$, which show a very strong correlation with observed…

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### The Origin of the Illusory Periodic Changes in the Gravitational Constant

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Anderson et al. have found that experimental values for gravitational constant, G, are oscillatory with a period of P = 5.899 +- 0.062 yr and an amplitude of A = (0.001619 +- 0.000103) F, where F is…

### Progress in Precise Measurements of the Gravitational Constant

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The Newtonian gravitational constant G, which is one of the earliest fundamental constants introduced by human beings, plays an important role in cosmology, astrophysics, geophysics, metrology, and…

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A large array of different instruments ranging from the simple torsion balance to the sophisticated atom interferometer can be used to determine G, which is several orders of magnitudes greater than the relative uncertainties of other fundamental constants.

### On Anderson et al . ( 2015 ) ’ s Sinusoidal Time Variation of the Newtonian Gravitational Constant

- Physics
- 2016

In a recent publication, Anderson et al., [Europhys. Lett. 110, 10002, (2015)], presented a strong correlation between the measured values of the Newtonian gravitational constant G and the 5.9 year…

### On the Cyclic Variations in Newton's Constant

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Periodic oscillations in Newton's constant G are contemporaneous with length of day data obtained from the International Earth Rotation and Reference System. Preliminary research has determined that…

### On the Anomalous Oscillation of Newton's Gravitational Constant

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Periodic oscillations are observed in Newton's gravitational constant G that are contemporaneous with length of day data obtained from the International Earth Rotation and Reference System.…

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