Neutron stars aren't the twinkle-twinkle kind you typically see in the night sky. They're stellar corpses, and incredibly dense sources of gravity, with perhaps 1.5 times the mass of the Sun packed into an area only a couple of dozen kilometres across. Around 9000 light years away from Earth, one neutron stars seems to have befriended a red dwarf. And scientists observed the new relationship beginning in a flash of energy.