Hinc itur ad astra


Holwarda, J. P. Πανσεληνος... Id est Dissertatio astronomica... Franeker, 1640.

Dutch astronomer, physician, philosopher, professor of philosophy and logics of Franeker University Johannes Phocylides Holwarda’s (Dut. Jan Fokkes van Holwerd, 1618–1651) The Full Moon ... id est Astronomy dissertation..., which describes Astronomical phenomena, observed by the author. His name was later given to one of the Moon craters. Illustration of observation of Venus and Mercury phases