S/2009 S 1 is a wee little moon—called a moonlet—in orbit around Saturn. At an estimated diameter of just 1000 ft (300 m), it's the smallest known moon! It was detected thanks to its shadow being cast on the nearby rings.
📷NASA/JPL/Space Science Institute
S/2009 S 1 is a wee little moon—called a moonlet—in orbit around Saturn. At an estimated diameter of just 1000 ft (300 m), it's the smallest known moon! It was detected thanks to its shadow being cast on the nearby rings.
📷NASA/JPL/Space Science Institute