Okay let’s say this story is old, which it is indeed. On April 15th, 2013 Professor Carl Murray was looking through the data of the Cassini-Huygens Mission, a joint mission between NASA, ESA and the Italian Space Agency to study Saturn, its rings and Moons. He was trying to image the Prometheus- one of Saturn’s 83 moons but accidently, he ended up discovering a potential formation of a new moon in Saturn’s Ring A, orbiting about 136,755 kilometers away from the planet.
He discovered some gravitational disturbances in the Ring A, one of the outermost rings of the Saturn. He discovered a 1200 Km long arc which was 10 km wide and was caused by the gravitational effects of any unseen nearby object that was about a kilometer in diameter, possibly a moon in the process of formation. The object was named Peggy after the researcher’s Mother-in law because he discovered it on her birthday.
Peggy is not expected to grow and become a larger moon. There are two reasons why astronomers think that Peggy will die as a baby. First reason is that it may be falling apart due to its collision with the dust and ice particles in the ring and later being there’s not much material in the ring for it to become a large moon. Saturn’s moon range in size depending on their proximity from the planet- the farther from the planet, the larger the Moon will be. Many of Saturn’s moons are made up of ice as so the rings. So the theory is that Saturn’s moons were formed from the ring particles and then migrated outward and coalesced with other moon in their way and became larger ones as we see them today.
Peggy sheds light on how Moons around giants like Saturn, Jupiter are formed. It shows us how moons like Titan may have formed in the massive rings and migrated outward. This is same as the planetary formation that how Earth and other planets were formed in the proto-planetary disk and later migrated away from the Sun.