Binary galaxy | Article about binary galaxy by The Free Dictionary
binary galaxy (bÿ -nă-ree, -nair-ee) Another name for physical double galaxy. See double galaxy.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive
At 83x this tight twosome is just an irregularly-shaped nebulosity, but 285x reveals a binary galaxy
Franz Kahn and Lodewijk Woltjer realized this unexpected state of affairs in 1959 and made the bold suggestion that perhaps Andromeda and the Milky Way are in fact gravitationally bound, forming a binary galaxy