Unusual Trends in Solar P-Mode Frequencies During the Current Extended Minimum

Unusually Wide Binaries: Are They Wide or Unusual?

Unveiling stellar magnetic activity using CoRoT seismic observations

Unveiling the gas kinematics at 10 AU scales in high-mass star-forming regions (Milliarcsecond structure of 6.7 GHz methanol masers)

Unveiling the main heating sources in the Cepheus A HW2 region

Unveiling the phenomenon of Double Periodic Variables

Unveiling the Structure of Pre-Transitional Disks

Updated phase coherent timing solution of the isolated neutron star RX J0720.4-3125 using recent XMM-Newton and Chandra observations

Updated stellar yields from Asymptotic Giant Branch models

Updating the Historical Sunspot Record

Upflows in funnel-like legs of coronal magnetic loops

Upflows in the central dark lane of sunspot light bridges

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