The number 40,000 might not sound particularly dramatic, but it represents humanity's growing catalog of near-Earth asteroids, rocky remnants from the solar system's violent birth that cross paths ...
Twenty years ago, the U.S. Congress instructed NASA to find 90% of near-Earth asteroids threatening Earth. They've made progress finding these asteroids that orbit the sun and come to within 1.3 ...
"Initially, it'll just be a new tool, an augmentation to the existing toolbelt of astronomical observatories. But ultimately, it should scale least expensively to the smallest or more distant ...
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