Home Science & Technology The red supergiant Betelgeuse was actually yellow 2,000 years ago

The red supergiant Betelgeuse was actually yellow 2,000 years ago

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Using historical images and descriptions of Betelgeuse over the centuries, scientists have been able to roughly determine when the supergiant star turned red.

The team discovered that the star, located in the Orion constellation in the Milky Way about 640 light-years from Earth, changed color from yellow-orange to red about 2,000 years ago. Betelgeuse is a red giant star, the stage that stellar bodies go through when they finish burning hydrogen in their cores, causing the core to collapse and the outer layers of the star to swell.

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