How scientists find the big asteroids that can threaten Earth
Mashable VR
MAY 21, 2022
Crucially, even a smaller asteroid, some 100 to 170 feet across, could destroy a place like Kansas City , home to half a million people. The ATLAS telescopes — two in Hawaii, one in Chile, and one in South Africa — can scan the entire sky each night. So the surveys for rocks large and "small" are vital.
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