The Oort Cloud is a theorized invisible spherical shell that surrounds the Sun.

The spherical shell known as the Oort Cloud is, for all practical purposes, invisible. Its constituent particles are spread so thinly, and so far from the light of any star, including the Sun, that ...

If an Oort Cloud object finds its way to the inner solar ... He noted about 20 of the comets had an average distance from the Sun that was more than 10,000 astronomical units.

In the wee hours of Thursday morning Angelenos will get their first peek at a double whammy astrological delight — a Hunter's moon that's also a supermoon.

Astronomers infer the Oort Cloud is there because it’s the only ... He noted about 20 of the comets had an average distance from the Sun that was more than 10,000 astronomical units.