Sun & moon

The Astronomy tab is computed from your station's coordinates - no external service, nothing to configure, and it works offline from the weather entirely. It needs only that your station has a latitude and longitude, which connecting WeatherLink discovers automatically.

Sun

• Sunrise, sunset and solar noon, with a progress bar through the day.
• Day length, and how much longer or shorter today is than yesterday - a few seconds around the solstices, over four minutes a day near the equinoxes.
• Civil, nautical and astronomical twilight, each as a dawn-to-dusk range.
• Azimuth and altitude right now: which compass bearing the sun is on and how high above the horizon.
• The next equinox and the next solstice, in the order they arrive.

Moon

• Phase, with its illuminated fraction and a matching symbol.
• Moonrise, moonset and transit - transit being the moment it crosses your meridian, its highest point of the night.
• Azimuth and altitude right now.
• Distance, the number behind a "supermoon".
• The next new moon, first quarter, full moon and last quarter, soonest first.

You can hide the moon panel under Settings, leaving the sun on its own.

About the precision

Equinoxes and solstices are shown with a time because the calculation behind them is good to a few minutes. Moon phases are shown as dates only - the lunar model behind them is good to a couple of hours, and printing a clock time next to that would be false precision. A paper almanac gives you the date for the same reason.

Polar latitudes

At high latitudes the sun does not always rise or set. Days without a sunrise or sunset show no time and no day length rather than an invented one; the phase of the sky (daytime, civil, nautical or astronomical twilight, night) is still correct, because it is read from the sun's actual altitude.

Next steps

• Sunshine hours - how much of that daylight was sunny
• Tabs & panels