Why isn’t there any sound in space? An astronomer explains why in space no one can hear you scream
In space, no one can hear you scream.
You may have heard this saying. It’s the tagline from the famous 1979 science fiction movie “Alien.” It’s a scary thought, but is it true? The simple answer is yes, no one can hear you scream in space because there is no sound or echo in space.
I’m a professor of astronomy, which means I study space and how it works. Space is silent – for the most part.
University of Arizona Distinguished Professor of Astronomy Chris Impey explains the science behind the Alien tagline, showcases slinkies as sound waves, and discusses why humans can’t speak across space but phenomena like galaxies and black holes can.
Also, a fun fact I did not know: “The word vacuum comes from the Latin word for empty.”
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J.R. Johnson 
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