PARIS, Nov. 20 (UPI) -- A bridge of hot gas connecting a pair of galaxy clusters across 10 million light-years of intergalactic space has been detected, European astronomers say.
In the early universe, filaments of gaseous matter pervaded the cosmos in a giant web and, while much of this tenuous filamentary gas remains undetected, astronomers had theorized it could most likely be found between interacting galaxy clusters.