Can you please eli5 how Nixon was able to speak to the astronauts on the moon from a landline in the oval office 60 years ago?
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The same way mission control was speaking to the astronauts: giant radio antennae in the form of dishes that beamed electromagnetic waves at the spacecraft. The same way a satellite sends a TV picture to your house, and the same way you listen to radio broadcasts.
Getting the president’s voice to the astronauts was as simple as routing a call through the communication systems, really. Instead of hearing the microphones in Houston, the astronauts would hear the President speaking instead.
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