el gordo

‘El Gordo’ – largest galaxy cluster ever seen, is colliding and growing

Galaxy clusters are the biggest stable structures in our Universe that we know of, typically containing 50 to 1000 galaxies. El Gordo Seven billion light years away and two million billion times heavier than our Sun lies El Gordo – which is Spanish for ‘the fat one’. Astronomers reporting at the 219th American Astronomical Society [...]