Can adjust speed. Wait for pattern. Adjust the tilt to see a side view. If set color range > 0, colors proportional to line direction. Called a "5-petaled rose"
The ratio of orbital speeds of Venus and Earth are 8 to 13, resulting in this five petaled rose pattern. Kept color range close to rose red. Near the inner loops, we see apparent retrograde motion where Venus seems to move backward in the sky from our viewpoint on Earth. There, Venus seems to pause, then move “backward” (westward) relative to background stars, before pausing and resuming its eastward motion. For simplification, we assume Venus and Earth are in coplanar concentric perfect circular orbits, with orbital periods in an exact 8:13 ratio. Planet images enlarged for visualization (not to scale).
