No matter how badly you want an asteroid to hit Earth, it’s not happening this weekend

The thing about words like “close” is that they’re relative, and space is really, really, really, big. A close call while you’re driving can mean another car coming within a foot of your own, but “close” in space terms can mean millions of miles. Still, scientists do their best to track objects passing nearby, says Amy Mainzer, a professor of asteroid surveys at the University of Arizona’s Lunar and Planetary Lab.

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