Of the moons found by the "Voyager 2" imaging team, only Puck was found early enough that the probe could be programmed to take pictures of it in some detail. Images showed that Puck has a shape of a slightly prolate spheroid (ratio between axises is 0.97 ± 0.04). Its surface is heavily cratered and is grey in color. There are three named craters on the surface of Puck. Observations with Hubble Space Telescope and large terrestrial telescopes found water ice absorption features in the spectrum of Puck.