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2020 February 17 The Changing Surface of Fading Betelgeuse Image Credit: ESO, M. Montargès et al. Explanation: Besides fading, is Betelgeuse changing its appearance? Yes. The famous red supergiant star in the familiar constellation of Orion is so large that telescopes on Earth can actually resolve its surface — although just barely. The two featured im...
2020 January 1 Betelgeuse Imagined Illustration Credit: ESO, L. Calcada Explanation: Why is Betelgeuse fading? No one knows. Betelgeuse, one of the brightest and most recognized stars in the night sky, is only half as bright as it used to be only five months ago. Such variability is likely just normal behavior for this famously variable supergiant, but the r...