Oort Cloud, Solar System and Spiral

A shell of icy objects at the edge of the solar system known as the Oort cloud has a pair of spiral arms that resemble a ...
Most of the long-period comets in the Solar System come from the outer Oort Cloud. The inner region is much more stable. It's ...
Researchers claim that there could be at least 1 million interstellar objects hiding in the Oort Cloud at the edge of our ...