This pie chart displays each planet’s share of total solar radiation, with slice labels showing percentages and a legend listing raw W/m² values. The visualization loads CSV data from a GitHub repository and uses D3 v7’s `d3.csv`, `d3.autoType`, `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` with `d3.schemeTableau10`. SVG paths and text elements are generated within a 640×480 canvas, while the HTML legend updates dynamically alongside the chart.