Weather station recorded shock wave 6 times as it went around the globe assuming the circumference of the earth is 4.0075x10^4 the earth is a perfect sphere and the shockwave continues to travel the same speed at what date and time will the shockwave be recorded again at the centre a second time

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.