Upflows in the upper transition region of the quiet Sun

Upper limits on bolometric luminosities of ten type Ia supernova progenitors from Chandra observations

Upper Limits on Pulsed Radio Emission from the 6.85 s X-ray Pulsar XTE J0103-728 in the Small Magellanic Cloud

Upper limits on the observational effects of nuclear pasta in neutron stars

Upper Limits on X-ray Emission from Two Rotating Radio Transients

Using a Differential Emission Measure and Density Measurements in an Active Region Core to Test a Steady Heating Model

Using a New Sky Brightness Monitor to Observe the Annular Solar Eclipse on 15 January 2010

Using Absorptive Linear Polarization Spectroscopy to Understand Imbedded Stars

Using an Ellipsoid Model to Track and Predict the Evolution and Propagation of Coronal Mass Ejections

Using HINODE/EIS to Confirm a Seismologically Inferred Coronal Temperature

Using Limb-Darkening to Measure the Masses of Red Giants

Using open clusters to study mixing in low- and intermediate-mass stars

Using the Sun to estimate Earth-like planets detection capabilities. III. Impact of spots and plages on astrometric detection

Using X-Ray Observations to Explore the Binary Interaction in Eta Carinae

UV Emission line shifts of symbiotic binaries

UV Spectral Synthesis of Vega

UV Spectroscopy of the Central Star of the Planetary Nebula A43

UV, optical and near-IR diagnostics of massive stars

UV-Bright Stellar Populations and Their Evolutionary Implications in the Collapsed-Core Cluster M15

uvby-$β$ photometry of solar twins: the solar colors, model atmospheres, and the Teff and metallicity scales