Add a way to know the bodies position

[jblemee]

Hello,

First, thanks a lot for the great work here.

It would be very nice if we had a way to know the position of the bodies (for instance : by date), like it's possible here : https://en.tutiempo.net/astronomy/sun-earth-moon-3d.html or here : https://solarsystem.nasa.gov/resources/2515/real-time-real-data/