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Planetary Defense

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Meteorite Fragments Strike Koblenz After Bright Fireball Sweeps Western Europe

Authorities describe a meter‑scale object that went undetected before entry.

Scientists Detail Nuclear Backstop for Asteroid That Could Strike the Moon in 2032

Hubble Captures Coma of Interstellar Comet 3I/ATLAS as Experts Uphold Natural Origin

DART Ejecta Analysis Reveals Boulder Clusters Could Tilt Dimorphos’s Orbit