(FILE PHOTO) In this image released by the NASA, the Chandra X-ray Observatory and the Hubble Space Telescope shows a halo of hot gas surrounding spiral galaxy NGC 4631 that is similar to the Milky Way galaxy while in space. (Photo by NASA/Getty)
Astronomers call it the monster. It was the biggest and brightest cosmic explosion ever witnessed. Had it been closer, Earth would have been toast.
To continue reading: Subscribe Now or Sign In
Log in or Subscribe now so you can share your opinion! It’s only a penny for a month trial.