"Interstellar River: Astronomers Uncover Massive Stream of Stars Spanning Galaxies"
Scientists have discovered a remarkable river of stars, named the Giant Coma Stream, flowing through intergalactic space in a cluster of galaxies located 300 million light-years away. This 1.7 million light-year-long stream is the longest ever observed and the first of its kind found outside of a galaxy. The find challenges expectations as stellar streams are not expected to survive in the dynamic environment of a galaxy cluster. The discovery provides an opportunity to study galaxy clusters and the mysterious dark matter within them, and suggests that similar structures may exist in other clusters.