Nasa Jet Propulsion Laboratory said Thursday it has pinpointed 90 percent of the asteroids that could pose a threat to Earth.
The mission, managed by JPL, says all of the mapped asteroids are 3,300 feet wide or larger. The asteroids were mapped by a spacecraft called WISE that so far has discovered 911 of the 981 largest threats predicted by models.
"NEOWISE allowed us to take a look at a more representative slice of the near-Earth asteroid numbers and make better estimates about the whole population," Amy Mainzer, the lead author of the new study and principal investigator for the NEOWISE project, told NASA.
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