Changes

'''The Tully-Fisher relation''' or '''The Tully-Fisher law''' is expression of observations showing that for ''disk galaxies'' the fourth power of the ''circular velocity'' of stars around ''the core of the galaxy''<ref name="starlight"/> is proportional to the luminosity <math>L</math>.<ref name="Dark Matter"/>     

'''The Tully-Fisher relation''' or '''The Tully-Fisher law''' is expression of observations showing that for ''disk [[galaxy|galaxies]]'' the fourth power of the ''circular velocity'' of stars around ''the core of the galaxy''<ref name="starlight"/> is proportional to the luminosity <math>L</math>.<ref name="Dark Matter"/>     

==The Tully-Fisher relation and halo dark matter==

==The Tully-Fisher relation and halo dark matter==