noun
: a galaxy exhibiting a central nucleus or barred structure from which extend concentrations of matter forming curved arms giving the overall appearance of a gigantic pinwheel — compare spiral nebula
noun
: a galaxy exhibiting a central nucleus or barred structure from which extend concentrations of matter forming curved arms giving the overall appearance of a gigantic pinwheel — compare spiral nebula
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012