Red Sky at Night: The Science of Sunsets

A meteorologist explains why the sky is sometimes so colorful.

We asked Stephen Corfidi, a National Oceanic and Atmospheric Administration (NOAA) meteorologist who's written about the science of colorful sunsets, to help us see the light.

I guess it depends on how you define "good," but I'm going to assume you mean a strikingly colorful one, where the colors are spectrally pure—say, vivid orange or red—as opposed to a more muted palette.

Keep in mind that what we see with our human eyes is just a tiny part of the electromagnetic radiation that's given off by the sun. That radiation contains a wide spectrum of wavelengths, but your eyes are only sensitive to certain parts of it: the so-called visible wavelengths. Different colors are associated with different wavelengths.

And depending on what

DON'T MISS THE REST OF THIS STORY!
Create a free account to continue and get unlimited access to hundreds of Nat Geo articles, plus newsletters.

Create your free account to continue reading

No credit card required. Unlimited access to free content.
Or get a Premium Subscription to access the best of Nat Geo - just $19
SUBSCRIBE

Read This Next

Is banning fishing bad for fishermen? Not in this marine reserve
SeaWorld allegedly violated the Animal Welfare Act. Why is it still open?
'World’s worst shipwreck' was bloodier than we thought

Go Further

Subscriber Exclusive Content

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history

See how NASA’s new Mars rover will explore the red planet