NGC 660 is a peculiar and unique polar-ring galaxy located approximately 45 million light-years from Earth in the Pisces constellation.

[4] The extreme number of pinkish star-forming areas that occurs along the galaxy's ring could be the result of the gravitation interaction caused by this collision.

[4] The region in the centre has a vast amount of star formation, so luminous that it is considered to be a starburst galaxy.

[6] Late in 2012, this polar-ring galaxy produced an enormous outburst having a magnitude of approximately ten times brighter than a supernova explosion.

The cause is not certain, but this event may have resulted from a tremendous jet being emanated from the galaxy's central black hole.