A celestial dimmer switch: why a distant star behaves so strangely
In short: For years, astronomers have watched KIC 8462852—known as Tabby’s Star—undergo erratic dimming events that defy standard stellar models. Its light fluctuates so unpredictably that it has sparked wild theories ranging from planetary collisions to the existence of alien-built megastructures in deep space.
Located in the constellation Cygnus, Tabby’s Star is an F-type star roughly 50 percent larger and 1,000 degrees hotter than our sun. Situated about 1,000 light years away, it became a focal point of astronomical mystery after researchers noticed its brightness rising and falling sporadically without a clear explanation. The behavior was so unusual that some observers dubbed it the "WTF (Where’s the Flux?) Star."
In May 2017, the star underwent a dramatic dimming event where it lost about 2 percent of its light over five days. This transition was described as if a giant dimmer had been turned in the sky; notably, the lights rebounded more slowly than they had faded. To investigate, Tabetha Boyajian and her colleagues utilized a global network of telescopes, including the Las Cumbres Observatory in Hawaii and Tenerife, to gather high-resolution data.
While the scale of the obstruction is massive—roughly 1,000 times the area of Earth—the cause remains contested. Hypotheses include a star devouring a planet, a catastrophic collision of planets, or even an artificial megastructure built by an advanced civilization. However, recent high-resolution spectroscopy and color measurements suggest that interstellar dust is a very likely culprit for the observed fluctuations.
This case serves as a primary example of how scientists navigate the unknown. When faced with data that contradicts existing models, researchers must rigorously test various hypotheses—from the mundane to the extraordinary—to determine which mechanism best fits the evidence provided by the cosmos.
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Sources
- Summary by Intellect · source: The most mysterious star in the universe | Tabetha Boyajian
- Also: The most mysterious star in the universe
- Also: The Most Mysterious Star In the Cosmos - Georgia State University News -
- Also: News about Tabby's star, the most mysterious star of 2017
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