Galaxy’s petal-like structures came from collision

A cosmic crash of two huge masses of stars, gas and dust probably gave way to structure of star clusters

By Ashley Yeager, 17:31 PM October 11, 2013

Not too long ago, galaxy PGC 6240, shown in a Hubble Space Telescope image, probably slammed into another huge swirl of stars, gas and dust. Such a cosmic crash would have shot ripples of energy through the galaxies, completely destroying their original structures. It could also have sparked star formation both within galaxies and in the regions of space around them, astronomers say.

Scientists have closely studied PGC 6240, which sits 350 million light-years from Earth in the southern constel...

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