It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

How fast and in which direction is our solar system moving through the universe? This seemingly simple question is one of the ...

Simulations reveal that Jupiter’s rapid growth disrupted the early solar system, creating rings where new planetesimals ...

Look to the east after sunset on a clear winter night and you’ll spot a bright, tightly packed collection of stars. That’s ...

When you see art of our solar system as the planet orbit the sun, you may notice that Earth's orbit has a tilt. It is not a perfect circle. What's more, Earth is not the only planet that displays such ...

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 ...

Astronomers have uncovered a runaway feeding frenzy in a rogue planet drifting freely through space, devouring six billion tonnes of gas and dust every second. Located 620 light-years away in the ...