The inhabitants of Rjukan in southern Norway have a complex relationship with the Sun. “More than other places I’ve lived, they like to talk about the Sun: when it’s coming back, if it’s a long time since they’ve seen the Sun,” says artist Martin Andersen. “They’re a little obsessed with it.” Possibly, he speculates, it’s because for approximately half the year, you can see the sunlight shining high up on the north wall of the valley: “It is very close, but you can’t touch it,” he says. As autumn wears on, the light moves higher up the wall each day, like a calendar marking off the dates to the winter solstice. And then as January, February, and March progress, the sunlight slowly starts to inch its way back down again.