A look at the potential effects of a rogue planet entering our solar system, from shifting Earth’s orbit to triggering ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Astronomers are gathering evidence of a massive hidden planet lurking beyond Neptune. Trump Cuts Millions After California ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

A scientist spotted an asteroid hiding in the sun's glare that orbits the sun in just 128 days, making it the second fastest ...

What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

LONDON — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper's authors have ...

“Overall, our findings challenge the conventional classification of Uranus and Neptune as ’ice giants’ and underscore the ...

The newly found exoplanet, named GJ 251 c, is about four times more massive than Earth and likely rocky, making it one of the ...