The two inputs are how long is your fence (in feet) and how many planets you want to include in your model (1-9, yep I included Pluto anyway).
However, planet orbits aren't perfectly circular - they will have a min (nearest to sun) distance, max (furthest from sun), and an average distance to the sun. This program calculates all 3 of those, so you can choose which one to use in your fence model (I'd generally use average).
There is an Easter Egg in this program if you use inputs "108" and "8" (fence length 108 and 8 planets), exclusive to the X16
![Smile :)](./images/smilies/icon_e_smile.gif)
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