His students later remembered him as a man whose thinking was three times faster than just about anybody else’s. When Henry Norris Russell graduated from Princeton University, his work had been so brilliant that the faculty decided to create a new level of honors degree beyond “summa cum laude” for him. This investigation, and a similar independent study in 1911 by Danish astronomer Ejnar Hertzsprung, led to the extremely important discovery that the temperature and luminosity of stars are related ( Figure 18.13). In 1913, American astronomer Henry Norris Russell plotted the luminosities of stars against their spectral classes (a way of denoting their surface temperatures). Or you might have a very tall, skinny fashion model with great height but relatively small weight, who would be found near the upper right.Ī similar diagram has been found extremely useful for understanding the lives of stars. You occasionally see a short human who is very overweight and would thus be more to the bottom left of our diagram than the average sequence of people. And, of course, there are some dramatic exceptions. It’s not mathematically exact-there is a wide range of variation-but it’s not a bad overall rule. Typically, if we have bigger bones, we have more flesh to fill out our larger frame. This makes sense if you are familiar with the structure of human beings. Generally speaking, taller human beings weigh more, whereas shorter ones weigh less. We can conclude from this graph that human height and weight are related. Most points lie along a “main sequence” representing most people, but there are a few exceptions. The plot of the heights and weights of a representative group of human beings.
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