By Asger Aaboe
Phenomena within the heavens are of serious significance to many, and masses of the lore of astronomy and astrology dates again to the earliest days of civilisation. The astronomy of the ancients is therefore of curiosity not just as background but additionally because the foundation for far of what's identified or believed in regards to the heavens at the present time. This ebook discusses very important issues in Babylonian and Greek astronomy.
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Extra resources for Episodes from the early history of astronomy
Again in March, I was occupied with routine matters. But the elimination of the constants was the first problem to tackle. And while I had thought of this on and off, I had not concentrated on it. But now this was the only outstanding problem. So, one weekend I sat down and formulated the basic problem. The basic mathematical problem as formulated in XXI (Sec. 3) was achieved during this weekend. I remember taking Ledoux to Walworth that Sunday morning and expressing my confidence that the problem could be solved.
It was clear that if my theory of turbulence was along the right lines, then it could be extended to hydromagnetic turbulence as well. A problem which had occurred to me in 1949–50 (and about which I had talked to Fermi at that time) came to the fore: the problem concerns an elementary theory of hydromagnetic turbulence along the lines of Heisenberg’s theory of hydrodynamic turbulence. This question occupied me during my seminars during the winter. The problem was finally resolved; and I was astonished that the theory gave two modes.
It was during this time that it occurred to me (while driving to Chicago on a Thursday) that one might choose the set of moment equations by considering the correlations at two different instants at two different places and then using the quasi Gaussian approximation. I discussed these ideas with Fermi during lunch one day and he seemed quite interested in them. I felt at this time that I had made a real break in the theory of turbulence; but this elation and the hopes that it raised were soon to be dashed.
Episodes from the early history of astronomy by Asger Aaboe