A recent study by NASA’s Spitzer Space Telescope proposes that the mystery object discovered around the distant star KIC 8462852 might just be a swarm of comets, rather than an extraterrestrial structure. This recent study, managed by Massimo Marengo of Iowa State University and to be issued in the Astrophysical Journal Letters, inspected the infrared light from the star. A remarkably huge amount of such light would show that a planetary impact or asteroid collision produced the large object seen diming the star’s light – and, even though not mentioned by the paper, infrared light would also be a signal of the proposed alien megastructure.
Marengo said in a statement "We may not exactly know yet what's going on around this star. But that's what makes it so interesting."