quasars are highly active but extremely distant galaxies, right?what kind of galaxies are they and do they represent an earlier stage of the lives of the conventional galaxies?i've a vague idea that quasars a galaxies in which the supermassive black holes at the centres are actively gobbling up matter. am i right? what exactly is the difference between a white dwarf and a neutron star in terms of composition. are neutron stars made of neutrons?where did the protons go. please clarify.