Part of the star went kablooey.
The star Betelgeuse visibly dimmed in 2019. Now, a new analysis reveals why: Betelgeuse blew out and is still recovering.
In late 2019, Betelgeuse's light started to dim. By February 2020, it had lost two-thirds of its normal luminosity as seen from Earth. Scientists studying the bizarre dimming concluded that the star itself was not imminently going supernova but that a giant dust cloud had obscured some of the star's light.
The new research also incorporated information from a variety of other stellar observatories, such as the STELLA Robotic Observatory in Spain's Canary Islands, and NASA's Earth-orbiting STEREO-A spacecraft. By piecing together different types of data, Dupree and her team were able to put together a narrative of the blowout and its aftermath.
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