Astronomers See Ancient Remnants of Incredible Galactic Explosion
scientist have discovered evidence of the largest energy outburst ever immortalize . The clues to this ancient detonation arrive in the word form of a jumbo bubble of ancient tuner waves . The researchers observed the Ophiuchus Cluster of galaxies , the secondly - brightest coltsfoot cluster in the sky when viewed in decade - beam , which sits 390 million light - year from Earth . The primal region of the cluster contains a peculiar feature : a concave edge , like a small bite taken out of a cookie ....