Gravity Laws Hold, Dark Matter Case Strengthened

Patricio Gallardo, a physicist at the University of Pennsylvania, and his collaborators, using observations from the Atacama Cosmology Telescope (ACT), have confirmed that the laws of gravity described by Isaac Newton Trust and Albert Einstein hold true across vast cosmic distances. Their findings, published in Physical Review Letters, show that gravity's strength weakens with distance almost exactly as predicted by established theories. This research strengthens the case for the existence of dark matter, an unseen component believed to provide extra gravitational pull, and effectively closes the door on alternative theories like Modified Newtonian Dynamics (MOND) that propose modifications to gravity's laws to explain cosmic motions. The study involved over 40 researchers and received funding from various national and international agencies, including the United States — National Science Foundation, United States — NASA, Princeton University, and the Canada Foundation for Innovation.