Assuming you’ve accepted Pluto’s demotion, Uranus and Neptune are the two planets in our Solar System farthest from Earth. That distance means humanity is still learning a lot about them. Some of ...

Lying at the very outskirts of our solar system, the ice giant Neptune has long represented both a challenge and a mystery to astronomers and space explorers alike. The dark and cold planet, the ...

Astronomers announced that they have discovered new moons around Neptune and Uranus. The International Astronomical Union's Minor Planet Center published its findings Friday, showing the first new ...

Astronomers with the International Astronomical Union have discovered three previously unknown moons at the farthest planets of our solar system — two circling Neptune and one around Uranus. The moons ...

Three secret moons have been discovered lurking out of sight in our outer solar system. These moons were found orbiting the furthest planets in our solar system: one around Uranus, and the other two ...

This August 1989 image provided by NASA shows the planet Neptune photographed by the Voyager 2 spacecraft, processed to enhance the visibility of small features. The International Astronomical Union's ...

WASHINGTON (AP) — Astronomers have found three previously unknown moons in our solar system — two additional moons circling Neptune and one around Uranus. The distant tiny moons were spotted using ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. WASHINGTON — Astronomers have found three ...

WASHINGTON — Astronomers have found three previously unknown moons in our solar system — two additional moons circling Neptune and one around Uranus. The distant tiny moons were spotted using powerful ...