I’ve read the article “The Green valley is a red herring: Galaxy zoo reveals two evolutionary pathway towards quenching of star formation early and late- galaxies” this was about how galaxies were placed into classifications by color in the past and how it was thought that red indicated passive galaxies that were no longer apart of star formation while blue galaxies were seen as active in star forming. This paper explains how star formation declines in late-type galaxies and early-type galaxies. When it comes to late-type galaxies or also know as spiral galaxies they experience more slow star formation because the gas supply is shut off and it continues by accessing gas reservoirs on the other hand early type galaxies or elliptical galaxies experience a more rapid star formation process and like the spiral galaxies the gas is shut off in addition to the removal of the gas reservoirs. This paper shows that the type of galaxy has a lot to do with the star formation.