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3I/ATLAS Planetary Drill
December 14 , 2025
27 days
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- Europe conducted the world’s largest planetary-defence drill, centred on tracking the near-Earth object 3I/ATLAS.
- The exercise was led jointly by the European Space Agency (ESA), NASA, and the United Nations International Asteroid Warning Network (UN-IAWN).
- The drill tested early-warning systems, tracking networks, emergency coordination, and public communication for asteroid threats.
- Ground telescopes and space-based sensors monitored 3I/ATLAS travelling at ~60 km/s to refine its orbital path.
- Simulations included trajectory analysis, impact probability calculations, deflection missions, and civil-defence responses.
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