Free Astronomy Magazine January-February 2025

49 ASTRO PUBLISHING searchers from over 70 institutions around the world and is managed by the Department of Energy’s Lawrence Berkeley National Labora- tory (Berkeley Lab). In their new study, DESI researchers found that gravity behaves as pre- dicted by Einstein’s general theory of relativity. The result validates our leading model of the Universe and limits possible theories of modified gravity, which have been proposed as alternative ways to explain unex- pected observations, such as the ac- T he sparkling band of the Milky Way Galaxy backdrops the Nicholas U. Mayall 4-meter Telescope, located at Kitt Peak National Obser- vatory (KPNO) near Tucson, Arizona. [KPNO/NOIRLab/NSF/AURA/R.T. Sparks]