The first stage of a total eclipse in which the moon moves in front of the sun and blocks off its light. The eclipse was observed from Fatehpur Sikri, a ruined Mughal city near Accra in northern India. (The photograph was taken using a small reflecting telescope of 125mm aperture and a focal length of 500mm with a focal ratio of 14.5. A mylar filter was used, this is a plastic film coated with aluminium to block the harmful light of the sun. The exposure was 1/60 second using 100 ISO Kodak Ektachrome slide film).
© Kevin Johnson / Science & Society Picture Library