Talk:Johannes Kepler

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Featured article Johannes Kepler is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so.
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Why is Tycho Brahe constantly referred to by his first name?[edit]

I must have missed it where an entire editing staff became friends with a deceased astronomer, for what reason on earth is formality being excluded and Tycho Brahe constantly being referred to as Tycho instead of his last name Brahe? Since when is informality supposed to be accepted or commonplaces, especially for an article that used to be of such quality?

It is standard practice to refer to Tycho Brahe as Tycho (look at Brittanica or any of a number of other sources). As to why this is so, I don't know. Paul August 16:55, 6 February 2015 (UTC)

Kepler's Equations - a kinematical deduction[edit]

In this e-book, the author presents a new deduction of the famous Kepler's equations using exclusively kinematical concepts. It contains the basic mathematical model to explain the true nature of Gravity and, consequently, of dark matter and dark energy. https://www.clubedeautores.com.br/book/133352--EQUACOES_DE_KEPLER?topic=cienciasexatas#.VSKqaMy5eM8 — Preceding unsigned comment added by 191.180.151.210 (talk) 15:50, 6 April 2015 (UTC)

Kepler's polyhedra[edit]

The article says "(within the accuracy limits of the available astronomical observations)". I am not sure that this is true. With his selected arrangement of his polyhedra, the errors were still in the region of 10%. This seems to be bigger than the errors in the observations. — Preceding unsigned comment added by 79.183.16.116 (talk) 12:34, 30 April 2015 (UTC)