Photography is a powerful art form. It can convey emotion, light, colour, movement. It can expose beauty in everyday objects and capture a moment in time. But how do you capture time itself? One technique used to do so is long-exposure photography, using a very slow shutter speed to capture the movement of elements like the stars, traffic, while the camera remains stationary. Dark-coloured objects will usually blur or disappear, while light objects will leave a trail in the photo. The result is a picture that effectively conveys the passage of time. We’ve selected fifteen beautiful examples from our photographers that showcase this technique.