PGC120 & PGC129
This is a crop from the stacked image that made up the P168/Hergenrother video clip. I dont know anythign about them but they are a nice pair of galaxies! PGC120 is the one with the bright core, PGC129 is the other one…. I’m off for a google to see if I can find out any more about them!
Apparently this pair is known as the Taffy Galaxies??? Distance is estimated to be around 150 million light years!!! Also identified as UGC 12914 & UGC12915 It seems these 2 galaxies have had a direct collision and this is the cause of the odd shape see http://arxiv.org/abs/astro-ph/0308476 & http://www.galaxyzooforum.org/index.php?topic=278957.0
Here is an annotated version, you can see a few more of these PGC galaxies….