Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Pluto is the tiniest planet in our solar system with a diameter of roughly 2,377 kilometers, making it even smaller than our ...

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have discovered a new planet in our solar system. advertisement.

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

What processes during the formation of Pluto's largest moon, Charon, potentially led to it having cryovolcanism, and even an ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

NASA has revealed that they have sent a man-made machine further than they ever have before, and they said they made an odd ...