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- What is the speed of sound in space? 7 answers
Neil degrasse Tysons documentary series the Cosmos, he mentions that we actually see the moon one second later than it actually is due to the distance of the earth and the moon and speed of light making us see the moon a second behind instead of at real time. If there was someone on the moon clapping (and we ignored other rules of physics like the sound fading and sound waves through space) how long would it take to hear them clapping from Earth?