Charles Augustus Young

Born Dec. 15, 1834, in Hanover, N.H.; died there Jan. 3, 1908. American astronomer. Member of the National Academy of Sciences (1872).

From 1877 to 1905, Young was a professor at Princeton University. He specialized in the study of the sun. He established the gaseous nature of the solar corona and discovered the green line in the spectrum of the corona. He was the first to observe a flare spectrum. Young carried out spectroscopic studies of the chromosphere, prominences, and sunspots.