It was put together with images from the Sloan Digital Sky Survey. There are four sections ( A , B , C , and D ) .
The SPRC is the Sloan Polar - Ring Catalogue , an atlas of 157 polar - ring galaxies .
SPRC was put together with images from the Sloan Digital Sky Survey. There are four sections ( A , B , C , and D ) .
The SPRC is the Sloan Polar - Ring Catalogue , an atlas of 157 polar - ring galaxies .