John EvershedDied 17 Nov 1956 at age 92 (born 26 Feb 1864). English astronomer who discovered (1909) the Evershed effect - the horizontal motion of gases outward from the centres of sunspots. While photographing solar prominences and sunspot spectra, he noticed that many of the Fraunhofer lines in the sunspot spectra were shifted to the red. By showing that these were Doppler shifts, he proved the motion of the source gases. This discovery came to be known as the Evershed effect. He also gave his name to a spectroheliograph, the Evershed spectroscope. He had been introduced to workshop skills in his youth by his elder brother, Sydney Evershed. John made optical instruments reflecting his budding interest in astronomy. Sydney went on to a career with electrical devices.