This four-panel graphic illustrates how the southern region of the rapidly evolving, bright, red supergiant star Betelgeuse may have suddenly become fainter for several months during late 2019 and early 2020. In the first two panels, as seen in ultraviolet light with the Hubble Space Telescope, a bright, hot blob of plasma is ejected from the emergence of a huge convection cell on the star

One of the brightest stars in the sky dimmed in 2019. Now we know why.

The star Betelgeuse visibly dimmed in 2019. Now, a new analysis reveals why: Betelgeuse blew out and is still recovering. 

The red supergiant star, which is about 530 light-years from Earth, is among the brightest in the night sky. The star forms the shoulder of the constellation Orion (The Hunter). It’s also geriatric: Betelgeuse is nearing the end of its stellar life and will eventually explode in a supernova visible from Earth, though it might take another 100,000 years, according to 2021 research

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