US EditionNew gravity test using 3D velocities of wide binaries backs modified Newtonian dynamics
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New gravity test using 3D velocities of wide binaries backs modified Newtonian dynamics
Tokyo, Japan (SPX) May 28, 2025 Astrophysicist Kyu-Hyun Chae of Sejong University has developed a new technique to test gravity at very low accelerations using the full 3D velocities of wide binary stars. Unlike previous methods limited to 2D sky-projected data, Chae's approach leverages Bayesian inference and Markov Chain Monte Carlo simulations to derive the probability distribution of a gravity parameter directly from relat
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