Title: Joannis Keppleri Admonitio ad astronomos, rerumque colestium studiosos, de raris mirisq[ue], anni 1631
Subtitle: phaenomenis, Veneris pvta et Mercvrii in solem incursu : excerpta ex ephemeride anni 1631 : & certo authoris consilio huic præmissa
First published: 1630
Subjects: Ephemerides