It’s disco time! Well not really. But in Katie Paterson’s installation in Somerset House it certainly feels like a party. Suspended on a string attached to the ceiling is a large twirling ball. A light projects on the ball and little dots twinkle across the room like stars. If you look closely at the ball you discover that it is composed of individual tiny photographs of solar eclipses. There are 10,000 images on the ball showing every recorded solar eclipse.