Radcliffe Wave origin identified in new preprint: Pulkovo Observatory astronomers Bobylev and Bajkova propose globular cluster NGC 4372 plunged through the Milky Way disk 55.5 million years ago, leaving a 9,000-light-year wave that now drives star formation in Orion, Taurus, and Perseus -- the first specific named impactor ever proposed.
Ancient Globular Cluster May Have Carved Radcliffe Wave Into Milky Way Disk