Resumen de Gravity shifts - and this time it's serious
The latest measurement of gravity, the so-called constant that puts a figure on the gravitational attraction between two objects, has come up higher than the current official value. Measurements of gravity are notoriously unreliable, so the constant is in permanent flux and the official value is an average. However, the recent deviation is particularly puzzling, as it is at once starkly different to the official value and yet very similar to a measurement made back in 2001. Now a team led by Terry Quinn of the International Bureau of Weights and Measures in Paris, France, and Clive Speake of the University of Birmingham, UK, has measured G using two methods: a modern version of the Cavendish experiment and one that relies on electrostatics. The resulting value for G is 240 parts per million bigger than the official one, set in 2010.
