"The results show that gravity weakens with distance in accordance with Newton's inverse-square law and Einstein's general relativity..."
A study of galaxy clusters at distances of 5 to 7 billion light-years has tested the laws of gravity on the largest scale yet.
Using the kinematic Sunyaev-Zeldovich effect, researchers measured the velocities of about 686,000 galaxies to analyze gravitational pull between clusters.
The findings provide no evidence for modified gravity on those scales, strengthening the case for dark matter as the explanation for observed gravitational anomalies.
The research was published in Physical Review Letters.