Published: Dec 10, 2025, 22:49 IST | Updated: Dec 10, 2025, 22:49 IST
Europe has launched its biggest-ever planetary-defence simulation as the giant interstellar object 3I/ATLAS nears the solar system. Massive, active and travelling from deep space, 3I/ATLAS is nearly 350 million KM from Earth but has triggered a global readiness exercise. Defence ministries, space agencies, and emergency units across Europe are simulating how to respond to an impactor of this scale. Scientists confirm the real 3I/ATLAS poses no threat but its arrival proves humanity must plan now, not later.