Astronomers spot 'mega-merger' of 14 galaxies
Using the Chile-based ALMA, an international team of astronomers has uncovered a dense concentration of 14 galaxies in process to become a massive galaxy cluster. Believed to be gravitationally bound by dark matter, the protocluster is located 12.4 billion light-years away, meaning its light started travelling towards the Earth when universe was only about a tenth of its present age.