About PiSpace Sky

PiSpace Sky lists 31,842 cities and towns. It brings calculated darkness, Moon conditions, useful sky targets and available weather into one place so you can plan a session.

What we calculate

• Sunset, sunrise, and the end of evening twilight using a real solar position model.
• Astronomical darkness, with a clearly labelled twilight fallback at high latitudes and explicit polar-day/night states.
• Moon phase, illumination, rise, set, altitude, and moonless windows inside the dark hours.
• Altitudes and compass directions for the five bright planets and a short list of naked-eye stars.
• Available cloud, temperature, wind, humidity and precipitation data from the National Weather Service and MET Norway, with native forecast time resolution.

Conditions at your observing spot

A city forecast covers a wider area than your observing spot. Local haze, light pollution, trees and buildings can affect what you see. Check the forecast close to the time you plan to go.

Data and corrections

Astronomy is computed locally. City and town references come from an attributed GeoNames extract, with coordinate and time-zone screening. Weather remains an external forecast, with limits that vary by provider. Read our sources and limitations for attribution, preparation states and update behaviour.

Corrections and questions: [email protected].