How Can We Know If an Asteroid Will Hit Earth?
我们如何知道一颗小行星是否会撞击地球？
Illustration of the orbital path of a large asteroid crossing the orbit of a planet representing Earth around the Sun
2025-02-07 1436词 晦涩
We’ve actually known how to do this for centuries thanks to German astronomer Johannes Kepler, who first figured out the requisite orbital laws in the 17th century. Since that time, the advent of better telescopes, digital cameras and fast computers have made the task much easier—though by no means foolproof.
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