The Arctic, night-day satellite image. This composite image of the Earth is set against a background of stars, and is centred on the Arctic. The North Pole is at centre, with North America at lower centre. The left-hand half of the globe (at night) shows densely populated areas (city lights, yellow). The right-hand half of the globe is lit by sunlight and shows clouds (white), seas (blue), and land cover (green and brown). Seen from above, as here, the Earth rotates anti-clockwise, and the day-night line indicates dawn on one side of the Earth (bottom) and dusk on the other side (top). This image, from 2001, combines data from several satellite sensors. For the separate images, see E074/085 and E050/683.