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 ...

There’s an old saying in astronomy — “comets are like cats; both have tails and are unpredictable.” For once, a comet is ...

Comet Tsuchinshan-ATLAS (C/2023 A3) will likely remain visible to the naked eye through October 21st and the largest ...

Astronomers infer the Oort Cloud is there because it’s the only logical explanation for the arrival of a certain class of comets that sporadically visit our solar system. The cloud, it turns out ...

Mid-October should be our best chance to view a comet not expected back for another 80,000 years, experts say.