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Space

Gigantic star has gone through a rapid transformation and may explode

A red supergiant star appears to have changed in just a few years – an astronomical blink of an eye – which suggests it may be getting ready to explode in a supernova

By Chris Simms

20 February 2025

An artist’s impression of the star WOH G64

ESO/L. Calçada

One of the largest stars in the known universe is undergoing a strangely rapid transformation and may soon explode as a supernova.

First catalogued in 1981, WOH G64 sits some 160,000 light years from Earth in the Large Magellanic Cloud, a small satellite galaxy of the Milky Way. It is one of the biggest red supergiants, the largest stars we know of. These are massive, cool stars that have run out of hydrogen fuel in their core and instead burn an envelope of hydrogen gas that surrounds them.…

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