Hubble image of Arp 220, also known as IC 4553.
Arp 220 is the aftermath of a collision between two spiral galaxies. The collision set off a burst of star formation, creating star clusters seen as bluish-white bright knots in this image.
This image is part of a collection of 59 images of merging galaxies released to celebrate Hubble's 18th anniversary in 2008.
Credit: NASA, ESA, STScI, A. Evans
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NASA Science
Hubble Interacting Galaxy Arp 220 - NASA Science
Arp 220 appears to be a single, odd-looking galaxy, but is in fact a nearby example of the aftermath of a collision between two spiral galaxies. It...