This visualization displays a spiral galaxy of 420 circles that bloom outward from the center, colored with the rainbow spectrum. The circles are positioned using the golden angle and square-root scaling, creating a phyllotaxis-like pattern. Built with D3 v7 and SVG, each circle transitions from radius 0 to its full size with staggered delays, then continuously pulses via chained `transition()` calls with `easeSinInOut`, demonstrating D3's animation capabilities with `interpolateRainbow` for color mapping.