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ESA noted:
The double star system VFTS 352 is located about 160,000 light-years away in the Tarantula Nebula. This remarkable region is the most active nursery of new stars in the nearby Universe and new observations from ESO’s VLT have revealed that this pair of young stars is among the most extreme and strangest yet found...VFTS 352 is composed of two very hot, bright and massive stars that orbit each other in little more than a day. The centres of the stars are separated by just 12 million kilometres. In fact, the stars are so close that their surfaces overlap and a bridge has formed between them.