The inner edges of Saturn's rings have long been a mystery, but a new study offers a fascinating explanation. The authors introduce the 'eclipse-Yarkovsky' (EY) effect, a process driven by light and thermal radiation. This effect, combined with solar radiation pressure, creates a net force that changes the angular momentum of the ring particles, leading to the formation of sharp ring edges. The study's findings are particularly relevant to Saturn's A ring, where the EY effect helps explain the ring's structure and substructure. The authors also suggest that the EY effect may have played a role in the formation of Mars' inner moon Phobos, potentially dispersing any residual ring system around the planet. This discovery highlights the importance of understanding the dynamics of planetary rings and their evolution, offering new insights into the formation and behavior of these celestial bodies.
