Planetary defense: How military and civil satellites are watching fireballs to help keep Earth safe from space rocks
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It came from outer space, exploding high above the South Atlantic off the coast of Argentina. That April 1 event — an incoming meteor, also termed a bolide — was observed by both U.S. space-based military and civil sensors.Hush-hush U.S. government satellite sensors detected the speedy fireball cutting through our atmosphere. The object's brightness peaked at an altitude of nearly 60 miles (90.5 kilometers) over the South Atlantic.That dazzling spectacle was also caught by the National Atmospher
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