Origin of the work:
An unpublished treatise, now lost
This was a short work based on natural scientific hypotheses valid from the Middle Ages until the time of Copernicus.
In addition to the Physics (the Physica), Comenius also put together a textbook on astronomy. As he wrote to his friend Jan Mochinger in 1633, it was a straightforward piece, so simply phrased that a student merely reading through it would understand heavenly phenomena even without the assistance of a teacher. It was based on geocentric theory, and opposed the new heliocentric opinions advanced by Copernicus in his De revolutionibus orbium caelestium (On the Revolutions of the Orbs of the World). The book was not published, because Filip Lansberg, to whom it was dedicated, had died in the meantime, and duty called Comenius to other things.
For further study, see also:
J. A. Komenský, Letter to Jan Mochinger, 1633, in: Adolf Patera, J. A. Komenského korrespondence. Prague 1892, p18
J. V. Novák & J. Hendrich, Jan Amos Komenský, jeho život a spisy. Prague 1932, pp679-680