U-B-V photometry of the spectroscopic-visual triple HD 165590

U-Th zonation-dependent alpha-ejection in (U-Th)/He chronometry

U.S. Naval Observatory CCD parallaxes of faint stars. I - Program description and first results

UBV photometry of eclipsing binaries in the SMC

UBVRI aperture photometry of early-type galaxies

ULF Energy Transport Induced by Magnetospheric Boundary Oscillations

ULF waves at comets Halley and Giacobini-Zinner - Comparison with simulations

Ultracompact H II Regions Formed by Gravitational Collapse in Expanding Shells of Larger H II Regions

Ultrahigh-energy pulsed emission from Hercules X-1 with anomalous air-shower muon production

Ultrarelativistic hydrodynamics - High-resolution shock-capturing methods

Ultrasonic investigation of melts in the system Na 2 O---Al 2 O 3 ---SiO 2

Ultraviolet fluorescent molecular hydrogen emission

Ultraviolet interstellar extinction toward NGC 6530 and the intrinsic energy distribution of 9 Sagittarii and HD 165052

Ultraviolet observations of cataclysmic variables - The IUE archive

Ultraviolet Spectral Images of EI Eri and HD 199178

Ultraviolet spectroscopy of the 'jetlike' condensations of NGC 4151

Ultraviolet to near-infrared spectral distributions of star-forming galaxies: Metallicity and age effects

Umbral oscillations in sunspots: Absorption of p-modes and active region heating by mode conversion

Unbiased Weights and Error Estimation in Monte Carlo Radiation Transfer

Uncertainties in field-line tracing in the magnetosphere. Part I: the axisymmetric part of the internal geomagnetic field