re: Neat picture of two galaxies that passed each other

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One of the coolest pictures ever taken, Hubble Ultra Deep Field - each point of light on here isn't stars but entire galaxies (and this was purposefully taken from a small point of sky that had very little in it)

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To add some perspective for those who don't know, here's the area of the night sky that was photographed to get the HUDF picture with 10,000+ galaxies. About a grain of sand held out at arm's length against the sky.