... Tonight's Sky . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... Proof that some galaxies are т??LIERsт?? A new study reveals the true origin of puzzling light from nearby galaxies white dwarfs, not central black holes, explain these observations. ... The presence of the gas throughout the galaxy eliminates the black hole explanation (pictured at the top left) and favors the white dwarf explanation (bottom right). ...