Star Dimming by its Asteroid Belt
Tabby's Star, also known as KIC 8462852 or Boyajian's Star, has been observed to vary in brightness since 1890.
From this story:
Scientists around the world have proposed a variety of theories, ranging from comet storms to alien "megastructures," to explain the short-term dips in brightness, but very recently agreed on a much more mundane culprit—dust.
The model for a star's light is based on self-sustaining fusion.
A change in its brightness is caused by either
a) an unlikely disruption in that fusion cycle, or
b) an obstruction in the light path.
For Tabby's Star, (b) was selected.
The explanation for Tabby Star's dimming is the disintegration of a moon around a planet resulting in an asteroid belt which dims the star's light. This disintegration is not smooth over time and the resulting fragments and dust are not in a uniform distribution. Also some portion of this debris can be melted by the star so some of the debris can disappear.
This scenario is presented as the explanation for the inconsistent changes in brightness.
This scenario is not believable.
The solar cycle or solar magnetic activity cycle is a nearly periodic 11-year change in the Sun's activity. Levels of solar radiation and ejection of solar material, the sunspots, solar flares, and coronal loops all exhibit a synchronized fluctuation, from active to quiet to active again, with a period of 11 years. This cycle has been observed for centuries by changes in the Sun's appearance and by terrestrial phenomena such as auroras.
While the cycle is the dominant influence on solar activity, aperiodic fluctuations also occur.
Our Sun has always been known to be slightly variable.
The asteroid belt in our solar system is so diffuse it is nearly invisible.
Despite our knowledge of our solar system, these astronomers offered an unlikely explanation.
The electric Sun model in EUT presents better alternatives.
Our Sun is part of an electrical circuit in its arm of the Milky Way.
Its radiation energy has an external source. Fluctuations in that circuit involving millions of stars could result in changes in its light.
We continue to learn more about the electric sun model. The Liquid Metallic Hydrogen Solar Model explains solar observations better than the fusion model.
The fusion model for a star has difficulty with both aperiodic and short period fluctuations.
The explanation from Columbia University for dimming is rather contrived.
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