John Evershed CIE[2] FRS[1] FRAS[3] (26 February 1864 – 17 November 1956) was an English astronomer.
He was the first to observe radial motions in sunspots, a phenomenon now known as the Evershed effect.
After retirement in 1923 he set up a private observatory at Ewhurst, Surrey and built a large spectroheliograph of special design and another with high-dispersion liquid prism.
He continued to study the wave-lengths of H and K lines in prominences, giving values of the solar rotation at high levels in different latitudes and at different phases of the solar cycle.
[7] W. H. Evans described a butterfly Thoressa evershedi in 1910 and named it after Evershed who had collected the type specimen.