Uber den Zusammenhang von Helligkeit und Spektraltypus in den Plejaden, 273 in Astronomische Nachrichten 186 columns 71–78, 1910
1910. 1st Edition. FIRST EDITION OF THE FIRST PRINTED H-R DIAGRAM, probably the most important diagram in stellar astrophysics” (Evans, The Curious Astronomer, 2014). In the volume offered, the German physicist Hans Rosenberg published “The Hertzsprung–Russell diagram (or H–R diagram) -- a scatter diagram showing the relationship between the “intrinsic..... More