Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

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

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

The star is surrounded by a protoplanetary disk, and this disk is the first evidence of debris condensing into what will ...

Such is the case with 3I/ATLAS, a third known interstellar object from outside of our solar system to be discovered, which ...

The astronomers observed hot minerals just beginning to solidify – the first specks of planet-forming material, the ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

Volcanoes act as windows deep into Earth. They help us understand the formation of our planet and the others in our solar ...

The bold question-askers at What If explore whether our Solar System could survive if it ended up orbiting a black hole.

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...

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