Vancouver to London: Earth's shadow from cruise altitude. As ordinary as the rising and setting of our sun is, sometimes an extraordinary sight catches the eye! The narrow, dark-blue band on the horizon, about 350km away still, is actually the shadow of our earth being projected off into space! The dark-blue band is the coming night. Above the band it is still daytime. The beautiful light from the setting sun shows the peaks of the Canadian Rockies below. We are looking at dusk which we sometimes call in photography, "the blue-hour" !