Home Science ‘Close Encounters of the Third Kind’ Holds Up 45 Years Later

‘Close Encounters of the Third Kind’ Holds Up 45 Years Later

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‘Close Encounters of the Third Kind’ Holds Up 45 Years Later

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Sound famously cannot travel in space. Sound travels through the vibration of atoms and molecules in a medium like air or water. In space, where there is no air, sound has no way to travel. Yet humans are totally entranced by the idea of sounds coming from space to us. In reality, even when astronomers study radio waves they are not really listening. According to the National Radio Astronomy Observatory (opens in new tab)

“Radio is a form of light. It’s just like visible light, but with a much longer wavelength. While visible light has a wavelength on the scale of atoms, radio light has wavelengths ranging from about the thickness of a pencil lead”

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