no other planets with visible ring systems like Saturn's have been directly observed outside our solar system. Saturn's rings are one of the most prominent and well-known features in our own solar system. However, it's important to note that exoplanet research is an active and rapidly evolving field, and new discoveries are made all the time.
While we have detected and characterized thousands of exoplanets to date, the majority of these detections have been made using indirect methods such as transit observations or radial velocity measurements. These techniques are generally more sensitive to the planet itself rather than its surrounding structures like rings.
Directly observing the fine details of exoplanetary systems, including ring systems, is challenging due to their small sizes, large distances from Earth, and the overwhelming brightness of their host stars. However, advancements in observational techniques and future space missions, such as the James Webb Space Telescope (JWST) and ground-based observatories, may provide us with the capability to directly image exoplanetary ring systems in the future.