This animated scatter plot visualizes planetary data, showing each planet’s diameter, number of moons, and orbital period as a colored, sized circle on a dark, space-themed SVG canvas. The planets continuously wander and bounce off the plot’s edges using a `d3.timer` loop that updates circle positions. Hovering reveals a tooltip with details like discovery date, while a legend groups planets by type. The code loads a CSV dataset, applies linear scales for axes and a sqrt scale for size, and uses `d3.axisBottom` and `d3.axisLeft`.