One of the largest known stars in the universe underwent a dramatic transformation in 2014, new research shows, and may be preparing to explode.

A study led by Gonzalo Muñoz-Sanchez at the National Observatory of Athens, published in Nature Astronomy today, argues that the enormous star WOH G64 has transitioned from a red supergiant to a rare yellow hypergiant – in what may be evidence of impending supernova.

The evidence suggests we may be witnessing, in real time, a massive star shedding its outer layers, shrinking as it heats up, and moving closer to the end of its short life.

WOH G64 was first discovered in the 1970s as as star of interest in the Large Magellanic Cloud, a dwarf galaxy orbiting the Milky Way.

It turned out the star was not only extremely luminous, but also one of........

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