691: Dwarf spheroidal galaxies revolve around the Milky Way. Ken Croswell @sciam, @ScienceMagazine.
Image: Dwarf galaxy: This composite of the giant barred spiral galaxy NGC 6872 is 522,000 light-years across, making it about five times the size of the Milky Way. NASA Goddard Space Flight Center/ESO/JPL-Caltech/DSS Ken Croswell @sciam, @ScienceMagazine; in re: Dwarf spheroidal galaxies revolve ar0und the Milky Way. https://www.sciencenews.org/article/milky-way-little-dwarf-galaxies-gas-stars