BA Physics 1970 University of Iowa; PhD Astronomy 1974, University of Wisconsin. Assistant Professor 1974-1979 University of Northern Iowa; Research Associate 1979-1981 University of Arizona; Faculty 1981-2002 Northern Arizona University; Visiting Astronomer 2002-2003 University of Tasmania. Retired in Flagstaff AZ since 2003. Visiting Professor University of Vienna Austria 1985-6.