From Earth, the Tychonic and heliocentric models predict the same planet directions — toggle the frame to see the diagram move while the sky does not.
Toggle Heliocentric ↔ Tychonic — the observation panel does not change. Sight lines from Earth never change. Click a row to highlight one planet.
Horizon strip at the ecliptic — compass azimuth, 0° north through east. Updates with the date and speed controls above.