The ∞ galaxy is interpreted as the aftermath of a nearly head-on collision between two face-on disk galaxies with massive, compact bulges. The bulges survived the collision, and the inner disk stars were swept up in outwardly expanding collisional rings around the bulges. The nearby galaxy II Hz 4 is the prototype for this kind of binary ring formation (R. Lynds & A. Toomre 1976). Compression and shocks in the colliding gas likely produced a dense gaseous remnant in between the nuclei, as has been observed in the bullet cluster on much larger scales. It is proposed that the black...