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Science

The inner solar system is spinning much slower than it should.

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The solar system, not to scale.
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The inner solar system rotates much more slowly than the laws of modern physics predict, and a new study could help explain why.

A thin disk of gas and dust, known as an accretion disk, orbits young stars. These disks, on which planets form, contain residual star-forming material that is part of the star’s mass. According to the law of conservation of angular momentum, the inside of the disk should spin faster as the material slowly spirals inward towards the star, much like figure skaters spin faster when they bring their arms closer to their bodies.


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