John,
This galaxy has only two rings, named a polar ring galaxy (PRG) - a rare type of galaxy with stars, gas and dust orbiting in rings perpendicular to the plane of a flat galactic disk
PRGs are dynamically peculiar, having a ring of gas, stars and dust orbiting in a plane almost perpendicular to the normal flat plane of the host galaxy, that is, they contain two separate velocity systems whose axes are perpendicular. The most popular view says that such galaxies are the result of an interaction, up to and including a complete merger with another galaxy.
It is a prolate-like triaxial structure in shape. Based on an analysis of the physical mechanism which can produce such a two-ring structure, the prolate-like triaxial model predicts that both rings achieve very long-lived states within only about 20 inner-ring rotation periods.
Eamonn A
  