How scientists find the big asteroids that can threaten Earth
Mashable VR
MAY 21, 2022
But something threatening could surprise us, like the unexpected football-field-sized asteroid that swung just 40,000 miles from Earth in 2019. The near-Earth asteroid 2019 MO as viewed and tracked by the ATLAS telescope survey in 2019. The name of the game is sky coverage. That's why watching is critical. Credit: ATLAS.
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