Astronomers have discovered asteroid 2025 SC79, a skyscraper-sized space rock orbiting the sun in just 128 days — the ...

Astronomers say 3I/Atlas will be visible in parts of the US sky for a short time, giving viewers a unique look at a comet from beyond our solar system.

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. A remarkable ...

The interstellar comet 3I/ATLAS is now reaching its closest point to the sun, or perihelion, on Wednesday, according to NASA.

If 3I/ATLAS were indeed a comet, its trip around the Sun in late October and the consequent solar heating should have ...

The European Space Agency's ExoMars Trace Gas Orbiter image of interstellar comet 3I/ATLAS as it passed close to Mars. (The European Space Agency) A mysterious interstellar comet — just the third such ...

"The national security establishment has already been doing this for five decades but thought that no one could replicate it, ...

A distant gas giant the size of 10 Jupiters is now the first planet outside Earth's solar system to be mapped in three ...

Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...