42 hubble's tuning fork diagram
It is often known colloquially as the Hubble tuning fork diagram because of the shape in which it is traditionally represented. Hubble's scheme divides regular galaxies into 3 broad classes - ellipticals, lenticulars and spirals - based on their visual appearance (originally on photographic plates). E. Hubble (Tuning fork diagram) Different types of galaxies Structure, Size , populations Distance measurements Bizarre objects - Quasars-starlike object is 3C 273, Quasar Hubble's Tuning Fork Diagram Percentage of 77% 20% 3% observed galaxies Mostly II Mostly I some I I in disk II in halo and bulge It is often colloquially known as the Hubble tuning fork diagram because the shape in which it is traditionally represented resembles a tuning fork. Tuning-fork style diagram of the Hubble sequence Hubble's scheme divided regular galaxies into three broad classes – ellipticals , lenticulars and spirals – based on their visual appearance (originally on photographic plates )....