What if there’s a planet hiding in our solar system, 10 times larger than Earth? While this theory has yet to be confirmed, ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

Centimeter-sized pebbles have been detected in protoplanetary discs using e‑MERLIN, filling in a critical phase of planet ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Some may remember that Pluto was once considered our solar system’s ninth planet until it was demoted to dwarf planet in 2006, when scientists began to realize how many planetary bodies exist ...

Jupiter is already the biggest planet by far in our solar system, but new research suggests it was somehow once even larger than it is now. Twice as large, in fact. To put that into context, those ...

Rare "in-sync" solar system discovered by scientists 04:12. Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside ...

Jupiter is the biggest planet in our solar system, according to NASA. The planet is what’s known as a gas giant, which means it doesn’t have a solid surface — though it may have a solid core ...

A newly found object may set a new record for the most distant dwarf planet in the solar system.. The object, called V774104, lies about nine and a half billion miles from the sun, or two to three ...

A 9th planet in our solar system might be found — and no, it’s not Pluto. Is there another planet out there? Researchers say they have hints of a new candidate ...

A potentially habitable planet about the size of Earth is orbiting the star that is nearest our solar system, according to scientists who describe the find Wednesday in the journal Nature.. The ...