'Asteroid 2019' passed about 73,000 kilometers from Earth, roughly one-fifth the distance to the moon
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Astronomers in Brazil and the United States separately discovered 2019 OK a couple of days ago, but it's surprise visit was only announced a couple of hours before it passed by. "The lack of warning shows how quickly potentially dangerous asteroids can sneak up on us," Brown wrote.
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I hope we're seriously investing in asteroid deflection technology...