Geometry of the spectrum-luminosity diagram
No. 30, 1967 (Algebraic topology)
India ink on paper, 21.5x32 cm.
Imagine that you could take the stars of the universe and arrange them according to some feature or quality such as their brightness, or intensity, or some other set of features. Here is another interpretation of the Hertzsprung-Russell diagram, where the spectral class of many stars is compared to their luminosity. In this image, it is as if we were to envision the core of this diagram from one side, as if we were looking from the perspective of a region of stars of the large spectral class. Into infinity soar such stars as the roasting white dwarfs, the subdwarfs, the white giants and the supergiants, while superimposed on the picture lies an infinite polyhedral partition, which takes on the appearance of a coordinate grid.
