Golden angle φ = 360° × (1 − 1/φ²) ≈ 137.508° — the irrational that maximizes packing.
Any rational angle creates visible gaps (spokes). Drag the angle slider near 137.5° to see optimal sunflower packing emerge.
Fibonacci numbers (3,5,8,13,21,34,55,89...) appear as visible spiral counts — a consequence of the golden ratio convergents.