I just want to check if anyone has additional information about a private astronomical research begun by Gauss in 1819, which dealt with the "movements of the solar system" in the galaxy (motion of the solar system relative to the fixed stars). In addition to the material in his nachlass (volumes 6 and 11:1), I found several interesting sources which show that through his correspondences and unpublished fragments Gauss was involved in attempts to try and define the movement of the sun by the statistical motion of the fixed stars.
Since i'm completely unfamiliar with those scientific matters, my question is therefore intended to be a framework for learning in a general way on this aspect of observational astronomy (i.e, mathematial tools, methodology) by achieving better understanding of Gauss's work on this. To be more specific, these are my questions:
- One such correspondence is his 1838 letter to Argelander (just Google "On a Letter from Gauss to Argelander" and you will find it). My first question is therefore a request for explanation of what Gauss actually did in this letter.
- In Gauss's werke, volume 11-1, p.390, appears a short note "About the frequency of optical double stars". Despite it's neglible length, Martin Brendel (the editor of Gauss's astronomical works) comments on it lengthfully, and the interesting title of the note just makes my curiousity greater. So my second question is just for explanation.
- Any additional useful information will be blessed.
As i said several times before, one of my main objectives in using this site is to gain a complete picture of all of Gauss's contributions to math and science, so once again, i appologize for being so annoying and tedious with my obssesive questions-asking about Gauss.