The unusual light curves for “Tabby’s Star,” which feature some extremely large dips and other smaller ones. The X-axis label “Kepler day” means days following the Kepler launch. (NASA/Kepler Space Telescope)

The unusual light curves for “Tabby’s Star,” which feature some extremely large dips and other smaller ones. The X-axis label “Kepler day” means days following the Kepler launch. (NASA/Kepler Space Telescope)