This animated visualization displays the planets of the solar system with their relative sizes to scale, though distances are not proportional. Circles and labels for each celestial body appear sequentially and transition smoothly across the black canvas. The code uses D3’s `select`, `transition`, and `easeLinear` APIs to animate circle radii, positions, and label opacity. Planet data, including names, distances, and radii, comes from Wikipedia’s list of gravitationally rounded objects. The Sun is depicted largest in yellow, followed by the eight planets and Pluto, each with a distinct fill color.