The Whirlpool Galaxy (M51A or NGC 5194) and M51B or NGC 5195. Photo Credit: R. Jay GaBany http://en.wikipedia.org/wiki/Whirlpool_Galaxy AND http://en.wikipedia.org/wiki/Whirlpool_Galaxy#mediaviewer/File:Messier51_sRGB.jpg
A composite image of M51, called the Whirlpool Galaxy, 30 million light years from Earth and 60 thousand light years across. The original images were taken with a telescope at Kitt Peak National Observatory, and the Hubble Space Telescope. (Photo: NASA via The Telegraph)
This four-color view of the Whirlpool Galaxy was taken before Spitzer ran out of coolant. Combined with a visible-light photo taken by the Kitt Peak National Observatory, the picture highlights that the drastically different galaxies are merging. "In visible light, that's not quite apparent. The infrared really shows it, though, as a red galaxy and a blue galaxy," Smith said, noting that studying such galaxy collisions was a primary goal of Spitzer.
Amazing New X-Ray Image of the Whirlpool Galaxy Shows it is Dotted with Black Holes Read more: http://www.universetoday.com/112332/amazing-new-x-ray-image-of-the-whirlpool-galaxy-shows-it-is-dotted-with-black-holes/#ixzz33jhi5GOE
The two coolest galaxy pictures we've seen in ages