Phase 1 Atlas Foundation

Northern Sky Atlas

A fixed, boundary-first map of the northern celestial hemisphere. Every region is drawn from actual constellation borders, with the equator as the outer rim and Polaris at the center.

Highlight constellation

Atlas layers

Show constellation labels Show stick-figure lines Show bright stars

Atlas ready

Select a constellation from the list or click a region on the map to test target highlighting for later quiz feedback.

This is a static SPA foundation for the quiz product. The next phase can reuse the same boundary paths for click hit-testing and prompt logic.

Center: north celestial pole Equator ring retained, edge crop removed