As an interstellar visitor passed through our cosmic neighborhood, space agencies including ESA and NASA — alongside more than 23 nations — conducted the largest planetary defense exercise ever attempted. The object posed no threat, but the drill tested humanity’s ability to detect, track, and respond to future space hazards. Earth is practicing — just in case. Cinematic visuals and audio generated with AI. Source: ESA / NASA / International Planetary Defense Coordination Office #PlanetaryDefens