View Full Version : Wrapping Around The Mystery Of Spiral Galaxy Arms

2013-Apr-03, 05:40 PM
How disk galaxies form their spiral arms have been puzzling astrophysicists for almost as long as they have been observing them. With time, they have come to two conclusions… either this structure is caused by differences in gravity sculpting the gas, dust and stars into this familiar shape, or its just a random occurrence which [...]

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