Module 03
Occasion
Midday unless you know the hour — birth certificates usually record it.
Amsterdam, Netherlands
The Sun was above the horizon at that moment. These stars were there, but nobody could have seen them.
Developing the plate…
Positions are true, without refraction, as star charts are drawn. East is on the left: you are looking up, not down at a map.
Stars to magnitude 6.5 — everything the unaided eye can see from a dark place.
Stars: HYG Database v4.1 (astronexus), CC BY-SA 4.0
Constellation figures and Milky Way outline: d3-celestial (ofrohn), BSD-3-Clause
Places: GeoNames cities15000, CC BY 4.0
Positions: astronomy-engine (cosinekitty), MIT