increase radius of the circle/radians, as required

Please allow adjustment of the radius of the sphere, as required, for any magnification/zoom of the map. Also please could you allow the line weight of the sun rise/set radians to be adjustable, preferably reducible. Your App is amazing and what I've been hoping to find for many years.It may have a significant, if not profound, impact to our understanding of our planet if my hunch is correct. If you can do the above I will be able to share my findings with you.