A lenticular galaxy is a galaxy with a central
bulge and disk but apparently lacking spiral arms and substantial amounts of
interstellar material. Lenticular galaxies are so named because of their
lens-like appearance when seen edge-on. In the Hubble scheme of galaxy
classification, lenticulars are known as S0 galaxies and are intermediate
in form between spiral galaxies and ellipticals.
|NGC 5866 in Draco.
Hubble Space Telescope image