Andrew is a freelance space journalist with a focus on reporting on China's rapidly growing space sector. He began writing for Space.com in 2019 and writes for SpaceNews, IEEE Spectrum, National Geographic, Sky & Telescope, New Scientist and others. Andrew first caught the space bug when, as a youngster, he saw Voyager images of other worlds in our solar system for the first time. Away from space, Andrew enjoys trail running in the forests of Finland. You can follow him on Twitter @AJ_FI.
Scientists estimate that impactors the size of around 0.6 miles, or 1 kilometer, wide could threaten the existence of human civilization. However, these asteroids are relatively rare, and scientists have identified most of them. But there are amedium-size asteroids of the type that NEO Surveyor will detect that could wipe out cities in the event of an impact, and astronomers believe they have found only about half of these space rocks so far.
The NEO Surveyor mission is being led by NASA's Jet Propulsion Laboratory in California with the survey investigation to be led by the University of Arizona and program oversight from NASA'sThe PDCO was established in 2016 to manage the agency's ongoing efforts in Planetary Defense, which also includes the
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