TO BE PUBLISHED IN ADVANCES IN MACHINE LEARNING AND DATA MINING FOR ASTRONOMY Preprint typeset using LATEX style emulateapj v. 11/10/09 GALAXY ZOO: MORPHOLOGICAL CLASSIFICATION AND CITIZEN SCIENCE
...the classification rules and provided detailed morphologies for thousands of galaxies. Several large catalogues of nearby galaxies with such classifications exists (e.g. The Hubble Atlas of Galaxies (=-=Sandage 1961-=-), or the Third Reference Catalogue of Bright Galaxies (RC3), (de Vaucouleurs et al. 1991)), and many of these classifications are collected in the NASA/IPAC Extragalactic ar X iv :1 10 4. 55 13 v1s[ ...
...h younger stellar populations (ironically more “early type" stars) than most “early" type galaxies. Since Hubble, there have been several updates to his classification scheme (for a recent review see =-=Buta 2011-=-) but key features have remained unchanged. What has changed dramatically is the number of galaxies catalogued and requiring classification. Before the advent of digital detectors in astronomy, astron...