Unglaub Klaus
Unguru S.
Unione Astrofili Italiani-``Planets" Section Team
United States Naval Observatory
University Cornell
University Groningen
University Keele
University Leicester
University Leiden
University Observatories Of Michigan
University Stockholm
University Valparaiso
University Washburn
University of Arizona Tucson Team
University of Bern Physikalisches Institut Team
University of New Mexico NESSI Team
University of Texas Collaboration
University) Carnegie Mellon
University-School "Ignatianum" Kracow Poland Collaboration
Unkroth A.