NGC 2207
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NGC 2207 is in the process of colliding and merging with IC 2163. But unlike the Antennae 
or the Mice Galaxies; they're still two separate spiral galaxies. They are only in the 
first step of colliding and merging. Soon they will collide looking a bit more like the 
Mice. In about a billion years time they will merge and become an elliptical galaxy.

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Billions of years from now, only one of these two galaxies will remain. Until then, spiral 
galaxies NGC 2207 and IC 2163 will slowly pull each other apart, creating tides of matter, 
sheets of shocked gas, lanes of dark dust, bursts of star formation, and streams of 
cast-away stars. Astronomers predict that NGC 2207, the larger galaxy on the left, will 
eventually incorporate IC 2163, the smaller galaxy on the right. In the most recent 
encounter that peaked 40 million years ago, the smaller galaxy is swinging around 
counter-clockwise, and is now slightly behind the larger galaxy. The space between stars 
is so vast that when galaxies collide, the stars in them usually do not collide.