"When meteors--falling toward Earth--meet our planet head-on, the relative speed of impact is about forty-five miles per second; when meteors have to overtake the Earth in its orbit, the relative speed of impact is about ten miles per second."Illustration: "Meteors and the Earth meet at point of intersection of their respective orbits. The diagram illustrates the meteors associated with the comet Giacobini-Zinner."
Issue: The Flash #150 (February 1965)
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