The inner solar system spins much more slowly than it should. Now, scientists may know why. - Space.com

The interactions between particles in an accretion disk may help to explain why the inner solar system spins more slowly than expected.

The inner solar system spins much more slowly than the laws of modern physics predict, and a new study may help to explain why.  A thin disk of gas and dust — known as an accretion disk — spirals ar… [+4397 chars]

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