2D & 3D Sky Simulator — Interactive Planetarium, 88 Constellations & Ephemeris | hoan.uk

Real-time 2D & 3D sky chart simulator with 88 IAU constellations, Tycho-2 star catalog, Messier/NGC deep-sky objects, planetary ephemeris, and local horizon projection.

Key Astrometric & Technical Capabilities

Human Sky Perspective (East-Left, West-Right, North-Up) 2D & 3D celestial projection
88 IAU constellations with star magnitude scaling and deep-sky Messier/NGC catalog
Real-time Sun, Moon, and 8 planets ephemeris with local observer coordinates (SSOT)