12 billion years old interstellar comet 3I/ATLAS may be older than the solar system

I/ATLAS arrived fast, bright, and strange. When astronomers spotted it on July 1, 2025, they knew almost immediately this was no ordinary comet.
Ars Technica

We’re about to find many more interstellar interlopers—here’s how to visit one

A few days ago, an inscrutable interstellar interloper made its closest approach to Mars, where a fleet of international spacecraft seek to unravel the red planet’s ancient mysteries. Several of the ...
IFLScience

Another Comet 3I/ATLAS Record Got Us Asking: How Do We Know An Object Is Interstellar?

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...