I am freelancer, specialized in astronomy and space flight. Most of my detailed articles - there are more than 300 - are printed in the Wiener Zeitung, an Austrian quality paper. Founded in 1703, this is the oldest still existing daily newspaper in the world.
Furthermore, I am the author of the book Helden des Himmels, which deals with the history of the astronomical science.
I give talks concerning historical topics. For instance, I speak about ancient astronomy, Copernicus, Galilei and Kepler - and other topics.