The odd nature of 3I/ATLAS led astrophysicist Avi Loeb to apply a thought experiment to it, highlighting everything that ...

Eleven times wider than Earth. Over 300 times more massive. And a million times more terrifying. Jupiter may look like a ...

The Solar System might not be as quiet and orderly as we think. Imagine one day looking up and seeing something strange in the sky, a small speck that grows larger and larger. Soon, it becomes ...

NASA is tracking a mysterious, fast-moving object entering our solar system, raising questions about whether it's just a ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper belt.

The samples, which were scooped up by NASA's OSIRIS-REx spacecraft during a brief yet dramatic touchdown on Bennu in 2020, ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

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 ...

Smithsonian researchers analyzed fragments of the near-Earth asteroid and discovered water-rich clays that hint at a distant ...

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NASA’s OSIRIS-REx samples from asteroid Bennu reveal stardust, water-driven chemistry, and clues to life’s origins in the ...