Please pick 2 planets to study the distance between them
Please rotate your screen
This visualization was inspired by CGPGrey's excellent video on which planet is closest to Earth. I should make a brief note here that the planets are not exactly co-planar, so this further affects distance.
Obviously, planet size is not to scale with distance, otherwise the planets would be invisible. The planet sizes are correct relative to each other. The sun is, of course, much smaller than in reality.
The effect is covered in much more detail in the source paper.