Heliocentrism is the model in which the Earth, Jupiter, Venus, Mercury, Mars, Saturn, Uranus, and Neptune revolve around the Sun at the center of the Solar System.
 Astronomers now estimate that the arcs are corralled into their current form by the gravitational effects of Galatea, a moon just inward from the ring
== Ancient and medieval astronomy ==While the sphericity of the Earth was widely recognized in Greco-Roman astronomy from at least the 4th century BC, the Earth's daily rotation and yearly orbit around the Sun was never universally accepted until the Copernican Revolution

