Hi, i'm uneducated about math and geometry, and I am wondering how you are able to calculate the angle in degrees, and wouldn't everything you look at in the sky come up with the same distance using this method?
First parallax is measured in relation to the background, the angle is measured in degrees, then divided by 2?
And the angle is solved with tan = o/a ?

How do you get distance from parallax, in relation to background into degrees and how can you solve TOA without OA