Lugduni Batavorum [Leiden], Iohannis Maire, 1631.
Martini Hortensi Delfensis Responsio ad Additiunculam D. Ioannis Kepleri, Caesari Mathematici, praefixam ephimeridi eius annum 1624.
Very rare first edition of a treatise by the Dutch autodidact astronomer Martin Hortensius (or van den Hove) (1605-39) refuting Johannes Kepler’s (1571-30) criticism of his measurements concerning the angular diameter of the sun. The two men first disputed this observational problem following Hortensius’ publication of his findings in the..... More