The mystery of Tabby's star began to unfold when in 2015 Dr. Tabetha S. Boyajian [boy-AA-jee-uhn] of Louisiana State University and her team published a paper describing the irregular dips in the light output of what otherwise would seem to be a garden variety star over the period 2009 to 2013. Subsequently a list of proposed explanations include swarms of comets, large asteroids, a debris disk, and even a massive alien megastructure.
