A team of astronomers at the University of Bonn in Germany has suggested that the four ultramassive stars, discovered two years ago and located in the giant star cluster R136 in the nearby galaxy the Large Magellanic Cloud, were created from the merger of lighter stars in tight binary systems. A red dwarf, the Sun, a blue dwarf, and R136a1 (ESO / M. Kornmesser) Until the discovery of these objects in 2010, with the heaviest more than 300 times as...
