1. Orbital Shadow Geometry
2.5D RAY TRACE
2. Earth Observer View
FOV: 1.5°
Umbra: Complete occultation of light source. Penumbra: Partial blockage. Antumbra: Occulting body appears entirely within light disk (annulus).
The Moon's orbit is tilted 5.14° to the ecliptic plane. Eclipses only occur when syzygy coincides with ascending or descending orbital nodes.
During a total lunar eclipse, Earth's atmosphere refracts sunlight, scattering blue wavelengths while bending red wavelengths into the umbra (Blood Moon).