World Scientific Milestone: Volunteers From the ‘Exoasteroids’ Program Find Three ‘City Killers’ that Nasa Had Not Seen

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According to NASA’s planetary defense program, it is estimated that the Earth could be surrounded by 15,000 potentially dangerous asteroids that have not been detected by current space surveillance systems. Known as “city killers” or “city killers”, they are more than 140 meters in diameter, so, if they hit populated areas, the consequences would be catastrophic. The problem, according to experts, is that most of these asteroids are very difficu…