Astronomy is a much needed necessity to make accurate charts.

However, with computer programmes making this easier it does mean we are not learning about the real planet's actual movements.

This is the app I mentioned that will help you spot planets (and some stars) https://itunes.apple.com/gb/app/astrolabe-clock/id421777015?mt=8

This is a good video from the British Museum showing a real ancient Astrolabe https://youtu.be/N8oWGwcdFmA

Here is Jeff Mayo's book The Astrologer's Astronomical Handbook https://amzn.to/2nOl9PX