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Originally Posted by russ_watters
Wrong. Have a look at the pretty pic of the fireworks. Place yourself on one of those flaming balls. Notice how the other flaming balls are moving away from you at different rates depending on where they are in relation to you. The ones parallel to your direction of motion (in front of you and behind you) are moving away from you faster than the ones perpendicular to your motion.
By viewing a small piece of that firework, you can figure out the direction of the center.
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Which is quite a different result than what you'd get if you carried out the same measurements while standing on a poppy seed embedded in a rising loaf of bread. You could not use the motion of the poppy seeds to find the center of the loaf.