WEBDrawing, Eclipse of the Sun 17 May 1882. A series of sunspot studies, observed and drawn by John Willis during 1882 . Science Museum Group Collection. Group of sunspots and veiled spots, observed 17 June 1875. Colour lithograph of sunspots and veiled spots by Etienne Leopold Trouvelot. Solar protuberances, observed 5 May 1873.