Focloir u
From South Dublin Astronomical Society
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Dictionary based on the Foclóir Réalteolaíochta, An Gúm ISBN 185791175X.
Online at http://www.acmhainn.ie/tearmai/realt.htm
UBV system córas m1 UBV
UFO (= unidentified flying object) úfó m4 (pl -nna)
U Geminorum stars réaltaí fpl U Geminorum
ultraviolet astronomy réalteolaíocht f3 ultraivialait
ultraviolet radiation (= UV) radaíocht f3 ultraivialait
ultraviolet ray ga m4 ultraivialait
umbra s lánscáil f2
Umbriel s (Sat.) Umbriel m4
unblemished a (of face of sun, planet, etc.) gan teimheal
unequal binary déréalta f4 éagothrom
unequal double star réalta f4 dhúbailte éagothrom
Unicorn, the s (= Monoceros) (Const.) an
tAonbheannach m1
unidentified flying object (= UFO) réad m3 eitilte gan aithint
Universal Time (UT) Am m3 Uilíoch, AU
universe s cruinne f4
unseen component comhbhall m1 gan fheiceáil
unstable star réalta f4 éagobhsaí
Urania s (Ast.) Urania f4
uranometry s (= celestial measurement) úránaiméadracht f3
Uranus s (Pl.) Úránas m1
Ursa Major (= the Great Bear) (Const.) Ursa Major
Ursa Major cluster réaltbhraisle f4 Ursa Major
Ursa Minor (= the Little Bear) (Const.) Ursa Minor
UT (Universal Time) AU, Am m3 Uilíoch
UV radiation (= ultraviolet radiation) radaíocht f3
ultraivialait, radaíocht UV