Scientists Observe the Biggest Cosmic Explosion 7.5 Billion Years Ago (Photo)

The huge cosmic explosion, described by the US media as the biggest in history, was detected on September 19th by a US space agency satellite. NASA announced that such a clear cosmic explosion visible to the naked eye had never been seen before, and it occurred at the edge of the universe.

It is estimated that the explosion is about 7.5 billion light years away, which means that the time of the explosion was 7.5 billion years ago, when the Earth did not even exist yet. NASA pointed out that this explosion was the biggest since the "Big Bang of the Universe".