... Star Clusters . ... Stars@ESO . ... The two stars in the extreme system VFTS 352 could be heading for a dramatic end, during which the two stars either coalesce to create a single giant star, or form a binary black hole. ... VFTS 352 is composed of two very hot, bright and massive stars that orbit each other in little more than a day. ... Extreme stars like the two components of VFTS 352, play a key role in the evolution of galaxies and are thought to be the main producers of elements such as oxygen...