A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert Bernecky
Date: 2018 Nov 10, 14:58 -0800
Here is a bit wordy write-up of how I understand parallax. Writing it up forced me to understand what is going on, and hopefully others will find it informative.
I should note that for high accuracy, people account for the shape of the earth not being a perfect sphere. That is not a topic I address.