Pluto exists on the fringes of our solar system, where sunlight is much weaker than it is here on Earth. For a brief moment during twilight on clear days, the illumination on Earth matches that of noontime Pluto. We call this the "Pluto Hour."

Use the tool below to determine when the next "Pluto Hour" occurs for your location. If you go outside at this time on a clear day, the world around you will be illuminated as brightly as the surface of Pluto.

Latitude: Longitude: