eldavojohn writes “The Bad Astronomer brings word of an asteroid discovered with a tiny chance of hitting Earth. While it’s only 50 meters wide, it could have the impact of a 20 megaton bomb. It’s still twenty million miles away so if it hits us, it won’t happen until 2098. The real story here is how a remarkable telescope, dubbed Panoramic Survey Telescope & Rapid Response System, that went operational in May found its first potential target in our growing impact alert system for Earth.”

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