Title. Also maybe more extreme, but how is the Mars Rover sending pictures to earth. I cannot grasp how this works over such a long distance.
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One thing that helps with these extremely long distance communications is that we know exactly where the signal is coming from. We even know the math to adjust for the time it takes for that signal to travel the long distances between there and Earth. So we can point a transmitter and receiver exactly where it needs to be in order to send/receive signals. Some averaging helps even out background noise, allowing us to see signals even if the received power is below the noise level.
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