... Gravitational wave search provides insights into galaxy evolution and mergers . ... Surprise pancake structure in Andromeda Galaxy upends galactic understanding . ... This composite shows the alignment of the satellite galaxies of Andromeda in relation to the view that we see from Earth (the top left panel shows a true-color image of the center of the Andromeda Galaxy taken with the CFH Telescope). ... The structure of these small galaxies lies in a plane, analogous to the planets of the solar...