On April 1, 2026, satellites over the South Atlantic spotted a bright trail — asteroid Polar-IM entering the atmosphere. Trajectory analysis revealed it came from other star systems.

Objects in the Solar System are held by the gravity of the Sun. To break free and head into interstellar space, you need to move faster than a certain threshold — like a thrown stone needs to reach escape velocity to leave Earth. Polar-IM exceeded this threshold by 9.6 km/s. Even accounting for all brightness measurement errors, its speed of 51.73 km/s (0.017% of the speed of light) left it only one path — out of our system.

Interstellar objects are fragments of comets or debris from exoplanetary systems, carrying cosmic dust from distant parts of the galaxy. Studying them is a chance to peek into the chemistry of other worlds without costly missions. Perhaps one day fragments of such rocks fallen into the ocean will tell us about the composition of distant planets.