When this beautiful Hubble image turned up as today's choice on NASA's Astronomy Picture of the Day site, I was very glad I hadn't already picked one to run this week. I am always fascinated by the deep space images with their galaxies stretching back into infinity, and this is an especially good one.
The subject galaxy, Arp 188, the Tadpole Galaxy, is spectacular as well. That long tail is probably the result of a long-ago quarrel with another galaxy.
Image Credit: Hubble Legacy Archive, ESA, NASA; Processing: Faus Márquez (AAE)