Solar Noon

High noon is when the Sun stands highest. On another world that light is brighter or dimmer than Earth’s. This instrument finds the clock time at your place today when Earth’s daylight is closest to that noon.

The fully illuminated Earth as seen from Apollo 17, showing Africa, Antarctica and swirling clouds

Surface noon

Earth

NASA (Apollo 17). Image source. NASA fact sheet.

World
Place

Use your device location, or enter coordinates. Nothing is sent to a mapping service.

Enter coordinates

Decimal degrees from −90 to 90. Example: 51.5074

Decimal degrees from −180 to 180. Example: −0.1278

Choose a world, then share a place. The answer is a clock time, not a colour.

How the match is made

Typical noon illuminance for each world is derived from the NASA planetary fact sheets (mean solar irradiance), converted to lux and adjusted for atmosphere where that matters. Venus uses a published order-of-magnitude surface value because the cloud deck blocks most sunlight.

At your coordinates the page samples today’s clear-sky Sun path and finds the morning and afternoon minutes whose estimated lux is closest to that target. Weather, haze, and the apparent size of the Sun are ignored. If a world is brighter than Earth’s brightest minute (Mercury) or dimmer than twilight (the ice giants and Pluto), the page says so instead of inventing a perfect match.

Still images are from NASA and ESA missions. Each caption names the mission and links to the source. Location is optional: refusing the browser prompt still lets you type coordinates. See the privacy policy.