More Than 30,000 Near-earth Asteroids Discovered by ESA

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A range of observatories are keeping watch, and discoveries are gathered by both the European space agency and NASA. in early October, this list finally clocked the 30,000 object mark.
Among the 400 newcomers that tipped the tally over the line, 50 were estimated to measure more than 140 meters wide. A rock of that size could wipe out a city with a direct hit or cause a decent amount of destruction to a region, so these are the ones that astronomers want to watch.
Just one of these new asteroids measured more than 1 km wide, which would devastate a much greater area on impact.
Credit: NASA/ESA

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