A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ducruy Jacques
Date: 2019 Oct 19, 12:51 -0700
A little question for [anyone] about the method of "appulse" of Halley.
If I understand correctly, at the moment of the observation, the difference apparent of celestial longitude between the moon and the star is zero : is it true ?
Thank you in advance.