Dark green/brown striped observation of Jupiter, 12 October 1904
Dark green/brown striped observation of Jupiter made by John Willis on 12 October 1904 at 10:15pm. On the reverse Willis has noted: "3 inch. 120. The satellite on his disk is No.I, the other, No.III" This drawing shows the shadow transits of the satellites of Io and Ganymede across Jupiter. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.