The white dwarf ZTF J1944+4557 plays hide-and-seek: its light dims by 30% every 4 hours 58 minutes. The dust particles here are no smaller than 0.2 microns and they dim all colors of the spectrum equally. But the strangest twist: the pattern of eclipses changes faster than the orbit, and sometimes a
arXiv:2508.18348 · 2025-08-25