Tiny galaxies orbiting another galaxy defy astronomy models
Astronomers have found a plane of dwarf galaxies orbiting perpendicularly around Centaurus A galaxy, that challenges the cold dark matter model of small galaxies being randomly distributed. While such phenomena have been observed around Milky Way and neighbouring Andromeda galaxy, a dwarf galaxy circling in a disk pattern 13 million light-years from Earth has been documented for the first time.