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The Oort Cloud is a collection of ice objects surrounding the Solar System that extends halfway to the nearest star.
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The Oort Cloud is a collection of ice objects surrounding the Solar System that extends halfway to the nearest star. Although its structure is roughly spherical, astronomers have simulated long-term perturbations from the planets in the outer Solar System and discovered that this process should be driving objects outward, which are then focused by the Galactic tide into two arms that spiral outward from 1,000 to 10,000 AU.
A Spiral Structure in the Inner Oort Cloud
Abstract page for arXiv paper 2502.11252: A Spiral Structure in the Inner Oort Cloud
arXiv.org (arxiv.org)
