celestial-sphere

Interactive map of Ethereum upgrades — execution-layer Devcon cities on a globe + consensus-layer stars on a celestial chart (EIP-8133) · Built with Periplum

An interactive digital armillary sphere (渾象) — visualizing the celestial sphere, the 28 Chinese lunar mansions, and axial precession across ±3000 years. Built with Three.js and astronomy-engine.

SceneryStack planetarium renderer. Project the night sky for an observer on Earth from latitude, longitude, and local sidereal time.

SceneryStack port of the NAAP 'Basic Coordinates and Seasons' lab. Explore terrestrial and celestial coordinates and how Earth's axial tilt produces the seasons across three screens.

SceneryStack port of the NAAP 'Rotating Sky' lab. Explore how the sky appears to rotate for an observer on Earth through a horizon system, a celestial sphere, and a combined interactive explorer.