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How Bright is Daytime on Pluto?

Lights in the Dark

Concept of Pluto's surface. © Ron Miller, used with permission.Concept of Pluto’s surface. © Ron Miller, used with permission.

We all know that Pluto is very far from the Sun, on average about 40 times as far away from it as Earth is, and as such it is very cold and dark. But just how dark is it on Pluto? If you were an astronaut walking around on Pluto would the Sun really just look like another bright point in an already star-filled sky, or would you actually be able to see the Plutonian landscape around you during the day (like in the illustration above by Ron Miller?)

Actually it’s brighter than you might think, even three and a half billion miles from the Sun. And with the New Horizons spacecraft closing in on the first-ever pass by Pluto in July, NASA has a way for you to get an idea of the type of lighting you would experience on the surface…

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