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 miniature galaxy, new research suggests.

A very rare treat is about to grace Earth's night skies.

NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the planetary part of our ...

Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune align in a rare celestial event, the last until 2040—coinciding ...

But in the grand scheme of the solar system, Earth's Moon isn't as big as you might think. Oberon is Uranus’s second-largest ...

The study has been published in Nature. Unlike regular ice, plastic Ice VII requires extreme conditions to form.

NASA has officially confirmed over 5,000 exoplanets. These worlds include icy, rocky, and gas planets with unique ...

Stark residents will be able to view a total lunar eclipse March 13-14, but won't see the solar one a few weeks later.

In keeping with the mother’s name, and the rare astronomical event, the team called the kittens Venus, Mars, Jupiter, Saturn ...

A rare full seven-planet alignment will be visible in the early night sky between Feb. 22 and 28. We have the tips you need ...