Today's Amateur Astronomy Photo of the Day:

Robert’s Quartet — four galaxies caught in a slow gravitational embrace, one of them unspooling a river of newborn stars into intergalactic space

Robert’s Quartet, catalogued as AM 0018-485, is a compact group of four interacting galaxies in the southern constellation Phoenix — NGC 92, a peculiar early-type spiral classified SAa pec; NGC 89 and NGC 88, both peculiar barred lenticular systems classified SB0/a pec; and NGC 87, a peculiar barred Magellanic irregular classified IBm pec