Hubble image of Arp 87
The Hubble telescope has taken a fabulous image of Arp 87, and with a great backstory at that. Check out Zolt Levay's tale of why it took seven years for Hubble to image this galaxy pair. It was supposed to have been imaged by the ACS camera on Hubble, but that instrument failed before they could complete the task. Fortunately that freed up a bit of time for observations with the WFPC2 imager, and the Hubble Heritage team got some time for Arp 87.
And a beautiful use of time it was, too.