|The apparent retrograde motion|
of an external planet (Mars, Jupiter,
Saturn, ..) as seen from the Earth
in position 1, 2, 3, .. ...
Clicking now on one of these labels, for instance Hoelderlin (23) , you get displayed on the screen all the articles having that label as keyword, in the example the 23 articles I wrote on Hoelderlin, his poetry, his influence on Heidegger, .. ... The same will obviously happen if you click on Geviert (16), Paolo di Tarso (12) and so on.