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Astro*Dictionary by Michael Erlewine





1 article for "Russell"

Russell, Henry Norris [Astro*Index]

(1877-1957) American astronomer. Born at Oyster Bay, NY; died at Princeton, NJ.

In 1914, he published his observations regarding a relationship between brightness of stars, their color, and their spectral class. The same fact had been discovered earlier by Hertzsprung, so the result is known as the Hertzsprung- hiRussell Diagram). In 1929, he worked out the composition of the Sun from its spectrum, finding it to be composed largely of hydrogen, with helium, oxygen, nitrogen, and neon forming the more important remains. In general, stars have been found to be composed of hydrogen and helium in a 9-1 ratio.


See also:
♦ Hertzsprung, Ejnar ♦ Light Spectrum


Astro*Index Copyright © 1997 Michael Erlewine