This scatter plot visualizes the diameters of planets and moons, with each dot colored by its base planet and labeled with emoji icons. The chart uses a D3.js v7 SVG rendering, with a band scale on the x-axis for categorical names and a linear scale on the y-axis for diameter in kilometers. Data is loaded from a CSV file hosted on GitHub, and tooltips provide details on type, diameter, and moon count for each celestial body.