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Great Dimming

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astronomy2 years ago

Unveiling Betelgeuse's Mysterious "Great Dimming" with 15 Years of Data

A team of astronomers has used 15 years of data from the STELLA robotic telescope to study the "Great Dimming" event of Betelgeuse, a red supergiant star. The data revealed five distinct layers of the star's photosphere and showed that the variations in the innermost layer were in line with the star's brightness variations. The analysis also identified two powerful shockwaves in the photosphere, which caused an outflow of material and subsequent infall across the layers. The star returned to its normal state in early 2022.

via ScienceAlert|
#astronomy#betelgeuse#great-dimming
astronomy2 years ago

Unveiling the Mysteries Behind Betelgeuse's "Great Dimming" with 15 Years of Data

A team of astronomers has used 15 years of data from the STELLA robotic telescope to study the "Great Dimming" event of Betelgeuse, a red supergiant star. They found that the dimming was not consistent across the star's sphere, with the southern hemisphere being darker than the northern. The data revealed that two powerful shockwaves in the photosphere caused a major outflow of material, leading to the dimming. The events didn't happen simultaneously across all photospheric layers, and it took until early 2022 for Betelgeuse to settle back down.

via Universe Today|
#astronomy#betelgeuse#great-dimming
astronomy2 years ago

Betelgeuse Brightens by 50% in Unexpected Event Before Supernova

Betelgeuse, a dying red giant star, is now shining 50% brighter than usual, following a mysterious dimming in 2019 caused by an enormous explosion. Scientists are keeping a close eye on Betelgeuse, as it is expected to explode into a supernova visible from Earth, though likely not for thousands of years. Betelgeuse's weird behavior is likely linked to the Great Dimming of 2019 and 2020, and the explosion was so massive that it created a dense cloud of cosmic dust that stood between the Earth and Betelgeuse, obscuring the star.

via Yahoo! Voices|
#astronomy#betelgeuse#cosmic-dust
astronomy2 years ago

The Strange Behavior of Betelgeuse Continues.

Betelgeuse, the red giant star, has grown uncharacteristically bright since the Great Dimming event in 2019. It has been fluctuating back and forth on a small scale but on a steady upward trend for months and is currently the 7th brightest star in the sky. However, scientists believe that its current behavior is more likely a bit of ongoing wobbliness following the 2019 dimming, and the star will return to normal within a decade. Betelgeuse is on the brink of death in cosmic timescales, but on human timescales, its supernova could be 100,000 years away.

via ScienceAlert|
#astronomy#astrophysics#betelgeuse
astronomy2 years ago

The Strange Behavior of Betelgeuse Continues.

Betelgeuse, the red giant star, has been growing uncharacteristically bright since the Great Dimming event in 2019. It has hit a recent peak of 156 percent of its normal brightness, triggering speculation of an imminent supernova. However, scientists believe that its current behavior is more likely a bit of ongoing wobbliness following the 2019 dimming, and the star will return to normal within a decade. Betelgeuse is one of the most interesting stars in the sky, located around 700 light-years from Earth, and is expected to continue to live out its twilight millennia relatively peacefully for some time to come.

via msnNOW|
#astronomy#astrophysics#betelgeuse