Why does Betelgeuse keep fading? The mystery of Orion's giant star

Betelguese, one of the brightest stars in the night sky, has been putting on quite a show lately — but not in the way you might expect.

The famous red supergiant in the constellation Orion has been growing noticeably fainter in recent months.

Of the 21 brightest stars in the night sky, Betelgeuse is perhaps the most enigmatic. Its changing brightness poses a puzzle: how do the star's pulsations, dust eruptions, and a possible companion contribute to its fading?

A giant star with a puzzling name

Even the translation of Betelgeuse's name is contentious. For a long time, it was thought to be a corruption of three Arabic words, usually translated as "The Armpit of the Giant." However, other experts in star nomenclature now dispute that interpretation, proposing instead "The Hand of a...