The Stars on a large folded poster from Hallwag showing the northern & the southern sky as discs with 61cm diameters. On the reverse side are extensive notes how the night sky changes according to the time of the year, etc. On one side the northern & southern sky are shown with stars & constellations graded according to their size, temperature, etc, as explained in the legend. Accompanying photos show the eight main nebulae. The reverse side provides a list of constellations with their principal stars, several drawings explaining how the night sky changes according to the time of the year at 50