EPHEMERISMajor planets, Earth’s Moon, and Galilean moons are calculated for displayed UTC using Astronomy Engine.
TIDAL LOCKINGThe Moon keeps its mean near side toward Earth while Astronomy Engine physical libration supplies its real wobble. Securely synchronous major moons face their parent from instantaneous orbit geometry.
PHYSICAL TIMEIAU-modeled and measured rotations advance from simulation UTC. Unknown rotations remain fixed rather than invented. Sol’s plasma evolves continuously; Earth’s cloud shell inherits the solid Earth orientation; direct longitude advection makes visible cloud features move 20% faster at every selected rate while preserving the 0.985-day mean-shell model.
CONTINUOUS CLOCKThe validated 1900–2100 UTC window cycles at either edge without pausing or changing your selected rate. The simulator runs until you explicitly stop it.
TRUE LOCAL SCALEEvery local-system solid diameter, AU orbit, binary separation, and moon distance uses one physical conversion. Sol is 109.30 Earth diameters wide; the Moon’s mean orbit is 30.17 Earth diameters away.
UNKNOWN PHASESMany exoplanets and minor moons lack enough observations for a unique current 3D position. Published size and orbit are preserved while representative phase or orientation remains labeled.