Scientists imaged the heart of the OJ 287 galaxy, uncovering a curved plasma jet around what appears to be two merging supermassive black holes. The structure reveals unimaginable energy levels and ...

For decades, astronomers have been puzzled by a mysterious glow of gamma rays emanating from near the center of the Milky Way. Two theories have emerged: either the light was the result of dark matter ...

"It's astonishing to find such a strong radio signal at this distance." A vast cloud of energetic particles surrounding a cluster of galaxies that existed around four billion years after the Big Bang ...