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Stars pass through each other, although orbits
disrupted
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Gas clouds collide
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Gas stripped away from stars
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Collisions cause bursts of star formation
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Ellipticals may be galaxies which have suffered
collisions
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Spirals may be galaxies which have not suffered
collisions
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Joshua
Barnes (Hawaii) and the Space Telescope Science
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Institude
provide a simulation of the Antenna Galaxies:
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http://imgsrc.stsci.edu/op/pubinfo/pr/1997/34/images/anima.m
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ov
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