This animation displays the relative sizes of the Sun and planets, scaled accurately while ignoring orbital distances, with each celestial body drawn as a colored circle that grows into place. The planets and their labels fade in sequentially using d3 transitions, with speeds and easings controlled via `transition().duration()`. Data originates from Wikipedia’s list of gravitationally rounded objects, and the implementation relies on d3’s `select`, `transition`, and `easeLinear` APIs within a simple SVG container.