Observed arrival · 2026-09-01
Firstdark, the astronomy trip-worthiness calculator
A planning tool for landscape and astrophotographers that weighs darkness, moon position, cloud cover, aurora conditions, eclipses, and visible targets for a chosen location.
Field notes
The tool separates locally computed astronomy from cached external conditions: sun, moon, twilight, and galactic-centre calculations continue without a signal, while cloud and space-weather readings retain an explicit age. Its planning horizon spans 28 nights for the report and eight weeks for ranked photographic subjects. The page also describes coordinate-based aurora thresholds and eclipse circumstances calculated for the observer’s actual position, rather than relying on country-level or generic latitude labels.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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