Today we take a look, thanks to a listener question, at an old nautical saying that goes, “Red sky at night, sailor’s delight. Red sky in the morning, sailors take warning.”

Is it true? Can we really predict the weather from colors in the sky? Well. to a degree, yes. We’ll take a look today at the science behind red sunsets and sunrises.

Photo credit: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Photographer Robert Havasy. Sailboat on Edgartown Harbor against a red sky at sunset. Taken July 4, 2012 on Edgartown Harbor, Edgartown, Martha’s Vineyard, MA.