By the way, your looks_like sphere seems to be HUGE-- almost like a sky_sphere.
Its radius is scaled up by d_sun. Did you mean to do that?
>     looks_like{
>    {  sphere
>       {  0, dSun //Location is relative to the light_source, not the origin.
>          pigment { color rgb <1, 1.0, 0.85> }
>          //Give the Sun a glowing appearance:
>          finish { diffuse 0 ambient 1 } //POV-Ray 3.6.
>             //or
>          finish { diffuse 0 ambient 0 emission 1 } //POV-Ray 3.7.

Maybe that's causing the problem. I would suggest something like...
looks_like{sphere{0, --some other smaller radius?---
(or maybe some fraction of d_sun)

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