Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in the Oort Cloud.
Our Solar System is in motion and cruises at about 200 kilometres per second relative to the center of the Milky Way.
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Space Mystery of the Week: Why Does Our Solar System Like Spirals?Even the little-understood Oort Cloud, at the outer edges of our solar system beyond view, has a partly spiral structure.
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