How scientists find the big asteroids that can threaten Earth
Mashable VR
MAY 21, 2022
The cameras snap four pictures of the same spot in the sky over an hour, and then software reveals any telltale movement in those frames. The name of the game is sky coverage. Beginning in 2016, the Catalina Sky Survey started detecting hundreds more asteroids each year, an improvement Christensen attributes to telescope improvements.
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