
Astronomers studying 3I/ATLAS, the third confirmed interstellar object ever recorded, say new data reveal that the comet carries material forged around a different star, offering an unprecedented peek into the chemical makeup of planetary systems beyond our own.
Discovered on 1 July 2025 by the ATLAS (Asteroid Terrestrial‑impact Last Alert System) survey telescope in Chile, 3I/ATLAS has a hyperbolic trajectory, confirming it is merely passing through the Solar System, never to return.