366-evolving-orbits-dixon – This two-part technical diagram illustrates the dynamic evolution of planetary and planetesimal orbits within a stellar system, contrasting an early configuration with a later, rearranged state. The upper panel shows an initial stage where thin, concentric, color-coded rings (orange, green, light blue, and white) encircle a central star on a single, relatively flat plane. The lower panel depicts a post-migration phase where the orbits have destabilized and evolved, showcasing an expanded, highly elongated, and eccentric outer white orbit that stretches far into the foreground, while the inner planetary tracks remain relatively contained. Gravitational perturbations may have caused the orbit of Pluto to become more elliptical. digital, 2004, copyright Don Dixon
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