Earth
How the stunning Earthrise became the world鈥檚 most famous photograph
On Christmas Eve 1968, Apollo 8 became the first crewed spacecraft to circle the moon. Emerging from its dark side, one astronaut reached for his camera
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On Christmas Eve 1968, Apollo 8 became the first crewed spacecraft to circle the moon. Emerging from its dark side, one astronaut reached for his camera
I remember being told that when you see a flash of lightning and start counting until you hear the thunderclap, the number you have counted to will amount to the number of miles distant the storm is. Is this true? If not, is there any way of calculating the distance based on the observed time difference between lightning and thunder?