This week, astronomers announced the discovery of three previously unknown near-Earth asteroids that had been hiding in the glare of the Sun - and one of them is a giant.At nearly a mile (1.5 kilometers) across, it is big enough to cause planet-wide destruction if it hit the Earth, though it won't come anywhere close enough to be a threat for a hundred years or so.
#years #recent-years #researchers #observations #initiatives #solar-system #intervention #lead-author #astronomers #hundred-years
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