Etienne Trouvelot

Étienne Trouvelot’s pencil and pastel drawings of celestial objects and phenomena were good enough to attract the admiration of the Harvard Observatory, which offered him a job in 1872. He accepted. Thanks to Trouvelot we get to see, in his words, “the celestial phenomena as they appear to a trained eye and to an experienced draughtsman.” People rocked up to see them when the 1878 World’s Fair opened in Philadelphia 1876.

In 1875, he was invited to use the U. S. Naval Observatory to use the 26-inch refractor for a year. During the course of his life he produced about 7,000 quality astronomical illustrations. Fifteen of his most superb pastel illustrations were published by Charles Scribner's Sons in 1881. He was particularly interested in the Sun, and discovered "veiled spots" in 1875. He was elected a fellow of the American Academy of Arts and Sciences in 1877.[6]

Trouvelot (born, France December 26, 1827 – April 22, 1895) saw his work and words published in the 1882 book The Trouvelot Astronomical Drawings Manual.  - via