Cool model... I particularly like the tilt and zoom... Nicely done.
I have been interested in Astronomy since primary school when I first saw Saturn through one of those 'collapsible' telescopes. Once I started working, I purchased my own telescope, until my working hours conflicted with 'viewing' hours. My cousin 'inherited' my scope. Then I bought a copy of "Practical Astronomy with your calculator". Armed with a scientific calculator, pencil and paper... 45 minutes later I could calculate the next Lunar Eclipse and if it could be seen from my current location.... It took about the same time to calculate the approximate position for each planet... 8 to 10 hours... and that was for just 'one' point in time...
I wore out that calculator decades ago... My eyesight is not what it used to be... Computer models are a BIG interest now... Your model has reminded me of the joy of Astronomy... Thank you.