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The Tychonic system, an implausible theory
Gabriele Vanin
Several scholars have accorded the Tychonic System a prominent place, considering it a credible alternative to the Ptolemaic and Copernican systems. In recent years, there have eve…
The beginning of celestial navigation
Gabriele Vanin
The use of the observed positions of celestial bodies to determine the location of a navigator and to direct vessels, was an aspiration of ancient seafarers. Various peoples, in th…
On alleged discovery of satellites of Jupiter by Simon Mayr (Marius)
Gabriele Vanin
In 1614, the German astronomer Simon Mayr published his claim to have discovered the satellites of Jupiter. Writing in the treatise Mundus Jovialis, Mayr made his assertion in a co…
An astronomical analysis of Hipparchus' Commentaries
Gabriele Vanin
Hipparchus is considered the greatest astronomer of antiquity. However, his fame is due, more than to what he has done, or said, or written, to what the scientists of some generati…