It Came From Outside Our Solar System, and It Looks Like a Comet 3I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the galaxy.

A comet from a solar system outside our own was first noticed on July 1 by a NASA telescope located in Rio Hurtado, Chile, as part of the Asteroid Terrestrial-impact Last Alert System (ATLAS).

Solar system coverage from Scientific American, featuring news and articles about advances in the field.

By Matthew Sparkes 2 July 2025 Last updated 3 July 2025 Comet 3I/ATLAS is the third interstellar object we have seen in the solar system E. Guido, M. Rocchetto, J. Ferguson ...

It's officially the third known interstellar object to pass through our solar system, and it poses no threat to Earth. The other two interstellar objects were 2I/Borisov, reported in 2019, and ...

A rare but faint interstellar visitor from beyond our solar system is racing toward the sun — and you can watch it live online today! Astronomers have identified this cosmic interloper as 3I ...

Remember, too, that the solar system has been around a long time and, crucially, Earth is still here. It’s been batted around a bit, but life persists.

An interstellar object called 3I/ATLAS is passing through our solar system this year, NASA announced yesterday. Today at 6 p.m. ET, you can see it for yourself, thanks to a livestream from the ...

Tiny shavings from a single meteorite could completely overturn our understanding of how the solar system formed, after the space rock turned out to be older than expected. Previous research ...

In space terms, our solar system is like a calm pond, but even the smallest pebble can cause ripples. According to the study in Icarus, a passing star within 10,000 astronomical units (AU) could ...

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System — only the third ever spotted, though scientists suspect many more may slip past ...

A rare visitor from beyond the solar system has just been found streaking through our cosmic neighborhood. On July 1, 2025, the NASA-funded Asteroid Terrestrial-impact Last Alert System (ATLAS ...