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

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It ...

Here's how the Earth could theoretically leave the solar system.

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s ...

Scientists now say an interstellar comet discovered earlier this month could be one of the oldest that astronomers have ever encountered.

Truly making Earth the centre of our solar system is going to take more than just fudging the maths. The sun is so much more massive than our puny planet that it is nearly impossible to force the ...

A study simulated what would happen if a super-Earth orbited in the middle of our solar system, and the results are chaotic.

“An Earth-like planet far beyond Neptune could redefine our understanding of the solar system,” says Lykawka.

In fact, our planet is something of a geological oddball given what we know about our solar system neighbors. Granite isn’t the only rock that’s ordinary on Earth but rare on other worlds.

According to researchers writing in the journal Icarus, a rare but possible event could one day push Earth out of the solar system entirely. The culprit? A wandering star.

Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But do other planets in the solar system have them too?

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These trans-Neptunian objects (TNOs) serve as remnants of the early solar ...