Because of its rapid dimming(up to 20% over a matter of days), Tabby’s Star has invited speculation that an alien civilization had built a megastructure around it to harvest its energy. A new study however, suggests that the cause of the dimming is likely an uneven dust cloud moving around the star.

See the source article by following the link below:
Because of its rapid dimming(up to 20% over a matter of days), Tabby’s Star has invited speculation that an alien civilization had built a megastructure around it to harvest its energy. A new study however, suggests that the cause of the dimming is likely an uneven dust cloud moving around the star.