A massive star 75 million light years away 'vanished' and astronomers think it may be the first time they've seen one collapse into a black hole without going supernova first. The blue variable star is in the Kinman Dwarf galaxy and its absence was spotted by astronomers using the European Southern Observatory Very Large Telescope (VLT). It is an 'unstable' type of star that is up to 2.5 million time ...