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Oort Cloud

Oort-cloud_HERO AMNH/D. Finnin

Exhibition Text

If the Hayden Sphere is the size of the globular star cluster Messier 80, then this model is the relative size of the Oort Cloud of comets.

The Oort Cloud is a spherical swarm of trillions of comets orbiting the Sun. It extends about a fifth of the way to the nearest stars.