... ESO, the European Southern Observatory . ... ESOтАЩs Very Large Telescope Interferometer has revealed the largest yellow star тАФ and one of the ten largest stars found so far. ... Using ESOтАЩs Very Large Telescope Interferometer (VLTI), Olivier Chesneau (Observatoire de la C†‡te dтАЩAzur, Nice, France) and an international team of collaborators have found that the yellow hypergiant star HR 5171 A [1] is absolutely huge тАФ 1300 times the diameter of the Sun and much bigger than was expected [2] . ...