21 cm radiation signals aliens

This is a news story, published by Phys Org, that relates primarily to NASA news.

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cm radiation

Phys Org

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Science

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Summary

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67% Informative

Using 21 cm radiation to communicate with extraterrestrial beings leverages a basic, universal constant.

It's tied to something very essential, known as the hydrogen spin flip, which releases energy in the form of radiation at a wavelength of 21 centimeters .

NASA 's Pioneer spacecraft, launched in the early 1970s , carries plaques with a diagram of the spin flip transition.

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English

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