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English: This comparison image shows the star Betelgeuse before and after its unprecedented dimming. The observations, taken with the SPHERE instrument on ESO’s Very Large Telescope in January and December 2019, show how much the star has faded and how its apparent shape has changed.
日期
来源 https://www.eso.org/public/images/eso2003c/
作者 ESO/M. Montargès et al.

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Comparison of [[SPHERE]] images of Betelgeuse taken in January 2019 (left) and December 2019 (right), showing the change in brightness and shape during the 2019-2020 fading

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