Explanation for G’s imprecision stumbles
Possible link of Earth’s rotation rate to gravitational constant questioned
![A 60-minute exposure of Mount Teide in the Canary Islands](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/ag_gravity_feat_free.jpg?fit=860%2C460&ssl=1)
AS THE WORLD TURNS A 60-minute exposure of Mount Teide in the Canary Islands shows star trails, a product of Earth’s spin. Tiny deviations in Earth’s rotation rate could account for difficulties in measuring Newton’s gravitational constant, a new study suggests.
Michael Bolognesi/Flickr (CC BY-NC-SA 2.0)