Complex C: A Low-Metallicity High-Velocity Cloud Plunging into the Milky Way

Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. Princeton University Observatory, Peyton Hall, Princeton, NJ 08544, Electronic mail: [email protected] Department of Astronomy, University of Massachusetts, Amherst, MA 01003 Department of Astronomy, University of Wisconsin, 475 N. Charter St., Madison, WI 53706 NASA Goddard Space Flight Center, Code 681, Greenbelt, MD 20771 National Optical Astronomy Observatories, Tucson, AZ 85726 Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ 08855 Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 JILA, University of Colorado and NIST, Boulder, CO 80309