system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why is the sky blue?


assistant
The earth's sky is blue due to how the gases in the earth's atmosphere scatter the short electromagnetic wavelengths of the sun's blue light while allowing red, orange and yellow light to pass through. The scientific name for this phenomenon is Rayleigh scattering.