There is a website that visualizes the distances in the solar system at the scale of
1 pixel to the diameter of Moon. In the lower right corner there is a symbol with a "C" and some lines around it that makes you automatically travel at the speed of light. Start the journey, put it on an extra screen if you have one and see
nothing happen for most of the time ;)
The current distance from Sun is shown in the bottom center and you can change units in the menu attached to it. "Astronomical units" or "light minutes" might be the most useful, kilometers or miles if you just want to be blown away by the order of magnitude.
https://joshworth.com/dev/pixelspace/pixelspace_solarsystem....
I also submitted it for discussion here:
https://news.ycombinator.com/item?id=27573172
Edit: fixed the scale, it's 1px:diameter of Moon, not 1px:distance Earth-Moon as I initially wrote.