
There are lots and lots of space rocks hanging out in our solar system. Most of them will never pose a threat to our planet, but a very tiny percentage will indeed come close. Inevitably, Earth will be on a collision course with a dangerous asteroid at some point in the future, and identifying the objects that pose threats is a very big deal. Modern telescopes and other observational tools can give astronomers a good idea of which rocks are headed our way, but relying on humans to scour for thes...
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