Solar-system planet aphelion (outermost) and perihelion (innermost) orbit-radius bands, with Sol a black dot at the center, projected onto the plane of the ecliptic. The inner solar system is magnified on the right for a closer look. On the left with a field-width of ≈ 60, the outer ring is Neptune (indigo) near 30, the next (and widest) annular-band is Uranus (blue) at about 19, then Saturn (turquoise) at 9.5, and Jupiter (cyan) at 5.2. Pluto and other dwarf planets are not included in part because of their large orbital eccentricities (including occasional overlaps with the orbit of Neptune). On the right with a field-width of only 7.08, the outer ring represents semimajor-axes of asteroid-belt objects (gray) from about 2 to 3.5, followed by Mars (green) at 1.52]AU], Earth (chartreuse) at 1, Venus (orange) at 0.72, and Mercury (red) at 0.39.