Other noteworthy projects of his include the first attempts to find Type Ia supernovae in clusters at high redshift (i.e. long ago in galaxies that are far, far away) and to use them to determine constraints on cosmological parameters, analysis of data from the Hubble Space Telescope to determine how the development of galaxies are driven by their own character and by the environment that surrounds them, kinematical studies of how globular clusters move around nearby galaxies, and investigations of the nature and formation of the ultra-compact dwarf galaxy populations in rich clusters. His study to determine the morphologies of galaxies in distant clusters, using data from images derived from the pre-refurbished Hubble Space Telescope, was used as the basis for the MORPHS collaboration.
