Johannes Schlaf

Johannes Schlaf (June 21, 1862 – February 2, 1941) was a German playwright, novelist, and poet. In his later years, he also wrote cosmological speculations and advocated for the long-discredited Copernican, or geocentric model of the solar system.

He based his idea of ​​the earth as the center of the universe on studies of the sunspot phenomenon, and tried to spread it through numerous publications. In addition to essays, books and newspaper articles, he also used correspondence, radio reports, and lectures for this purpose.

Selected Bibliography

 * Professor Plassmann und das Sonnenfleckenphänomen. Weiteres zur geozentrischen Feststellung (Professor Plassmann and the sunspot phenomenon. More on geocentric determination), 1914
 * Auffallende Unstichhaltigkeit des fachmännischen Einwandes. Zur geozentrischen Feststellung (Conspicuous lack of validity of the professional objection. On the geocentric determination), 1914
 * Die Erde – nicht die Sonne. Das geozentrische Weltbild (The earth - not the sun. The geocentric view of the world), 1919
 * Neues zur geozentrischen Feststellung (News on geocentric determination), 1921
 * Die geocentrische Tatsache als unmittelbare Folgerung aus den Sonnenfleckenphänomen (The geocentric fact as a direct consequence of the sunspot phenomenon ), 1925
 * Kosmos und kosmischer Umlauf. Die geozentrische Lösung des kosmischen Problems (Cosmos and cosmic circulation. The Geocentric Solution to the Cosmic Problem), 1927
 * Die Sonnenvorgänge (The Sun Processes), 1930
 * Ein wichtigstes astronomisches Problem und seine Lösung (A major astronomical problem and its solution), 1937