Galaxies leave Fingerprint of the early Universe.

The most massive galaxies in the Universe host supermassive black holes at their centres. These truly colossal black holes chew up surrounding material at astonishing rates, expelling huge amounts of radiation as they do so and glowing as some of the brightest objects in the known Universe! Despite their incredible distances from Earth, the regions surrounding these black holes shine so brightly that their appearance is similar to that of stars in our own galaxy, the Milky Way.

Read more "Galaxies leave Fingerprint of the early Universe."