One of the difficulties when judging distances in the solar system, other than that they are very large, is that the solar system is mostly empty space. Orbit lines only give a hint of motion and indicative scale.
I've added some planar grids to the ecliptic to try to help visualise distances at logarithmic scales starting at 1AU, with each grid fading out as the next fades in. Grids can be circular, square, or hexagonal. Circular grids are useful to visualise orbit eccentricity, perihelion and aphelion. Square grids are useful to disambiguate from orbit lines.
I've yet to find a compelling use for hexagonal grids, however they appear to be useful for Klingon tactical displays.
Additional screenshots are in the gallery.
1 Background filter generated from image credit Nick Risinger, skysurvey.org