This program uses "qualitative physics" to produce its planetary models, i.e., the planet parameters will increase or
decrease with mass and distance changes in the manner theoretically expected BUT the quantitative values presented should be considered
"ballpark" figures. The planet properties are determined from interpolation formulae calibrated against the known terrestrial planets rather than
by direct computation from the formal equations of interior and atmospheric structure. Enjoy the qualitative results but don't bet the farm
on the precise quantitative values.