UCDs as Probes of the Major and Minor Merger Histories of Galaxies

UCDs in the Coma Cluster

UGC 4599: A Photometric Study of the Nearest Hoag-Type Ring Galaxy

UGC8802: A Massive Disk Galaxy in Formation

UHE neutrino astronomy and neutrino oscillations

Ultra deep AKARI observations of Abell 2218: resolving the 15 um extragalactic background light

Ultra deep sub-kpc view of nearby massive compact galaxies

Ultra High Energy Cosmology with POLARBEAR

Ultra Long Period Cepheids: a primary standard candle out to the Hubble flow

Ultra Steep Spectrum radio sources in the Lockman Hole: SERVS identifications and redshift distribution at the faintest radio fluxes

Ultra-Compact Dwarf (UCD) galaxies in the Antlia cluster

Ultra-Compact Dwarfs in the Coma Cluster

Ultra-Compact Dwarfs in the Core of the Coma Cluster

Ultra-Compact Dwarfs in the Fossil Group NGC 1132

Ultra-deep Spitzer Mid-Infrared Spectroscopy of LIRGs and ULIRGs at z ~ 1-2

Ultra-faint dwarf galaxies as a test of early enrichment and metallicity-dependent star formation

Ultra-high precision cosmology from gravitational waves

Ultra-light Axions: Degeneracies with Massive Neutrinos and Forecasts for Future Cosmological Observations

Ultra-luminous Infrared Galaxies in Sloan Digital Sky Survey Data Release 6

Ultra-luminous X-ray sources and remnants of massive metal-poor stars