Classes of these objects lie on the Hubble tuning fork and include lenticular and elliptical, and the Sun is located in one of the spiral arms of one of these objects..
One type of these objects features a phenomenon wherein luminosity scales up by the Doppler factor raised to three minus the spectral index; that is relativistic beaming. The velocity dispersion of another class of these objects is related to their luminosity by the Faber-Jackson relation. The first type is first classified as radio-quiet or radio-loud and an early subtype to be discovered was named for Carl Seyfert. Classes of these objects lie on the Hubble tuning fork and include lenticular and elliptical, and the Sun is located in one of the spiral arms of one of these objects.. For 10 points, name these astronomical objects that include the Milky Way.
One type of these objects features a phenomenon wherein luminosity scales up by the Doppler factor raised to three minus the spectral index; that is relativistic beaming.
{galaxies} [accept {active galactic nuclei} early]