UKIRT Upgrades Program: control of the telescope thermal environment
UKIRT upgrades program: preparing for the 21st century
Ukraine in international asteroseismic projects
Ukrainian radiometric realization of the candela
Ukrainian Virtual Observatory (UkrVO). The Goals, Structure, and Tasks
UKS 2 open cluster BV photometry (Bica+, 2000)
Ulam's Conjecture is True for Connected Graphs
Ulasitai: A new iron meteorite likely paired with Armanty (IIIE)
ULF pulsation mode coupling in the ionosphere and magnetosphere
ULF wave fields measured in the low latitude ionosphere
ULF wave occurrence statistics in a high-latitude HF Doppler sounder
ULF Waves in the Cusp Region as Observed by the SERSIO Sounding Rocket and on the Ground at Barentsburg, Svalbard
ULF-VLF electric field measurements during the 2001 Leonid storm
ULF/ELF ionospheric electric field and plasma perturbations related to Chile earthquakes
ULTIMA free-flying large-aperture space telescope
Ultimate approximations in nonmonotonic knowledge representation systems
Ultimate removal mechanisms of elements from the ocean
Ultimate removal mechanisms of elements from the ocean--a comment
Ultra broad band seismology on InterMarsNet
Ultra heavy nuclei in the source composition of cosmic rays