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    Study of Supergiant star Betelgeuse unveils the cause of its Pulsations

    February 10, 2021, Categories  Astronomy/Space

    Recent brightness variations of Betelgeuse. Stellar pulsation causes the star’s brightness to vary, but the large dip in brightness in early 2020 is unprecedented. A comparison of direct images of the surface of Betelgeuse between January 2019 and December 2019 show that large portions of the star faded in December 2019, which could indicate a dust cloud appearing in front of it. The images were taken by the European Southern Observatory’s (ESO’s) Very Large Telescope. (Credit: ESO/M. Montargès et al.) For brightness data, see the caption of Fig 2.

    Recalibrated its mass, radius, and distance. Betelgeuse is normally one of the brightest, most recognizable stars of the winter sky, marking the left shoulder of the constellation Orion...

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