The twilights
Astronomical twilight
Astronomical twilight is the last of the light, with the sun 12° to 18° below the horizon.
Below 18° the sun no longer lights any of the air above you; what glow remains is the stars, the moon, and the city.
Golden hour, the twilights and the moon, where you stand.
Sol for iPhone is coming soon, with each of them for the place you stand, on your phone and your wrist.
Astronomical twilight, where you stand.
You stand at the middle of your horizon. The dots are the sun’s path today, warm where the light turns golden; the stage opens at eighty minutes after sunset. Slide through the day, or drag the sky to turn it.
How Sol measures it.
From 12° to 18° below, the sky is dark to the eye but not to a telescope: the faintest stars and the Milky Way wait for its end. Near midsummer, anywhere north of about 48°, it never ends and the sky never gets fully dark — Paris, Vancouver and everywhere beyond keep a glow in the north all night.
Make time for the light.
Sol for iPhone is coming soon, with golden hour, the twilights and the moon for wherever you stand. Leave your address for early access and one email when it ships.
Explore the light
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