An icy object within Saturn’s rings may be a new moon in the making.

Images taken April 15, 2013, with NASA’s Cassini spacecraft captured an arc at the edge of the planet’s rings that appeared 20 percent brighter than everything around it. The arc, along with protusions in the rings’ usually smooth edge, suggest that something is tugging on the ice and rock circling Saturn, scientists report April 14 in Icarus. The observations suggest that the object is no more than a kilometer in diameter and may provide details about how the planet’s known moons formed. Most scientists observe that while useful Cassini is seldom in position to study this area and thanks to its limited propulsion can never get close to a targeted area. Even others persist and argue that it’s time we sent another orbiter to Saturn, equipped to assume a circular orbit just outside that ring.