Dressler, Alan

Alan Dressler has made many fundamental contributions to the study of large scale structure in the universe over the last 30 years, including the quntification of the so-called morphology-density relation in clusters. He also played a leading role in the discovery of the Great Attractor and massive black holes in nearby galaxies. More recently, he participated in the MORPHS project, using Hubble Space Telescope images to show that bursts of star formation were much more common in galaxies 5 billion years ago than they are today.