Just for the fun of it.. "How do the astronauts communicate in space if sound cannot travel in a vacuum? Since sound does not travel through vacuum, how can the astronauts communicate from space to earth? How do astronauts communicate with each other? Sound cannot travel through the vacuum of space, but visible light and other forms of electromagnetic radiation can. One of these forms is commonly called radio. The astronauts have devices in their helmets which transfer the sound
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