Astronomers on the hunt for modestly sized asteroids that could vaporize a city or bulkier beasts that could sterilize Earth's surface have spotted a new potential threat.But there's no immediate need to worry it'll be many generations until it may pose a danger to our planet.Detecting uncharted space rocks relies on spying sunlight glinting off their surfaces.
#years #researchers #successfully #generations #destruction #solar-system #astronomers #large-swaths
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