Far beyond Neptune lies a vast and unsettling frontier filled with dwarf planets, ancient ice worlds, collapsing atmospheres, ...

NASA’s newly launched IMAP mission is set to tell us more about the boundary between our Solar System and interstellar space ...

That would make it thousands of times more massive than any moon orbiting a solar system plane  — so massive it could make ...

The craters bear the names of astronomers who revolutionized our understanding of the night sky.

A rare discovery beyond Neptune is forcing scientists to rethink early solar system dynamics and the forces that shaped ...

Planetary rings explained: composition, formation theories, and a comparison of Saturn, Jupiter, Uranus, and Neptune’s rings.

Skygazers who look up at the moon tonight may be able to spot Saturn below it. Here's when and how to spot the conjunction.

Discover the story of Gleisa 710, an orange dwarf star traveling through space toward our Solar System. While it won’t ...

In astronomy, an occultation is when a celestial body or object — like the moon or a planet — passes in front of a distant celestial body or object — such as a star or other solar system body — and ...

The Helix Nebula is one of the most well-known and commonly photographed planetary nebulae because it resembles the “ Eye of ...

In a statement Thursday, astrophysicist Amri Wandel of Hebrew University in Jerusalem said his research challenges the traditional concept of the "habitable zone," the narrow orbital range around a ...

The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...