The sky is not only blue – the brightness of the air makes it green, yellow and red too

This article was originally published on Conversation. (opens in new tab) The publication contributed articles to Space.com’s Expert Voices: Op-Ed & Insights,

Michael G. Brown (opens in new tab)Associate Professor in Astronomy, Monash University
Matthew Kenworthy (opens in new tab)Associate Professor in Astronomy, Leiden University

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