Travel through time to witness some of the most remarkable episodes in our solar system's history, uncovering its ancient ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. The size of the solar system is defined by the volume ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as Planet X, prominent astronomers ...

A renowned physicist believes he's cracked the mystery of where a giant unidentified object hurtling through our solar system came from. Harvard physicist Avi Loeb and student researcher Shokhruz ...

A group of astronomers from the US, Europe, Chile and South Africa have determined that 70,000 years ago a recently discovered dim star is likely to have passed through the solar system’s distant ...

Is there a massive undiscovered planet on the outer reaches of the Solar System? The idea has been around since before the discovery of Pluto in the 1930s. Labelled as planet X, prominent astronomers ...

Discover the dramatic forces creating spectacular weather on neighboring planets and moons. Out in the solar system, the weather gets wacky – with globe-spanning dust storms, monsoons of liquid ...

Oumuamua, the first interstellar object detected in 2017, is most likely a fragment of a Pluto-like body. Scientists believe it was flung out of the solar system billions of years ago during its ...