There are currently 3 astronomical definitions for the tag 'galaxy'.
galaxy
bllacertaeobject, dgalaxy, harogalaxy, lgalaxy, magellaniccloud, milkywaygalaxy, ngalaxy, activegalaxy, barredspiralgalaxy, bipolargalaxy, bluegalaxy, brightgalaxy, companiongalaxy, diskgalaxy, doublegalaxy, dwarfgalaxy, earlytypegalaxy, ellipticalgalaxy, emissionlinegalaxy, faintgalaxy, fieldgalaxy, giantgalaxy, headtailgalaxy, hypergalaxy, infraredgalaxy, interactinggalaxy, irregulargalaxy, latetypegalaxy, lenticulargalaxy, massivegalaxy, multiplegalaxy, nearbygalaxy, peculiargalaxy, primordialgalaxy, protogalaxy, radiogalaxy, ringgalaxy, spiralgalaxy, starburstgalaxy
fanaroffrileyclass, holmbergradius, hubbleclassification, hubblediagram, tullyfisherrelation, yerkesclassification, activegalacticnucleus, collision, coma, coolingflow, differentialrotation, edgeeffect, evolution, galaxystructure, halo, integratedmagnitude, isophotaldiameter, localsupercluster, luminosityfunction, massdistribution, masstolightratio, origin, quasargalaxypair, surfacephotometry, velocityfield