This line chart visualizes solar radiation levels for eight planets, ordered by their distance from the Sun. Using D3.js v7 with SVG rendering, the code loads CSV data from a GitHub repository and maps the values with `d3.scalePoint` for the categorical planet axis and `d3.scaleLinear` for the radiation intensity. A monotone curve (`d3.curveMonotoneX`) connects the points, with circle markers at each planet, while rotated tick labels and axis titles clarify the ordered categories and units.