Summary:

- Scientists have discovered that Saturn's moon Titan has a dense atmosphere that remains intact, despite the moon's low gravity. This finding challenges the traditional understanding of how planetary atmospheres are lost over time.

- Titan's atmosphere is primarily composed of nitrogen and methane, and it is much denser than Earth's atmosphere. This dense atmosphere has been a puzzle for scientists, as Titan's low gravity should cause it to gradually escape into space.

- The study suggests that Titan's atmosphere is maintained by a delicate balance of processes, including the production of methane from internal sources and the interaction between the atmosphere and the moon's surface. This discovery provides new insights into the evolution of planetary atmospheres and the potential for habitable environments on other worlds.