NASA explained: “As they orbit the Sun, Near-Earth Objects can occasionally approach close to Earth.
“Note that a ‘close’ passage astronomically can be very far away in human terms: millions or even tens of millions of kilometres.”
As of February 5, 2019, NASA has discovered a total of 19,585 Near-Earth Asteroids (NEAs).
In human terms, this might seem far enough of a passage for comfort, but on the cosmic scale of distances, CB2’s passage is extremely close.
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