It's a tiny planet, roughly the size of Mercury, and given the rate at which its shedding dust, Rappoport et al. estimate the little exoplanet will disintegrate entirely in about 100 million years. That's oodles of time compared to the average human lifespan, but it's a blink of an eye for the cosmos.
"This might be another way in which planets are eventually doomed," Dan Fabryky, another member of the Kepler Observatory team, cheerily noted. "A lot of research has come to the conclusion that planets are not eternal objects, they can die extraordinary deaths, and this might be a case where the planet might evaporate entirely in the future."
Ah, poor little exoplanet circling KIC 12557548, we barely knew you.
Images: (top) Artist's conception of the comet-like tail of a possible disintegrating super Mercury-size planet candidate as it transits its parent star named KIC 12557548. NASA/JPL/Caltech. (bottom) Artist's rendering of the Kepler mission. NASA/Public domain.