Weird shape-shifting clouds of dust seem to be orbiting a distant star

The TIC 400799224 star system is home to the mysterious events DECaPS; Schlafly 2018
Something is going on around a star 2300 light-years away. A strange object is blocking out light from the star by circling it. However, the shape and size of the object appear to change constantly and astronomers don't know what it might be.

Brian Powell, NASA's Goddard Space Flight Center Maryland, and his colleagues spotted an unusual pattern in the light of a binary star system called TIC400799224 using Transiting Explanet Survey Satellite. They discovered that it happens about once per year.