The upper moon and central planet are half illuminated which implies a light source in the same plane as the rings at a great distance above the top of the monitor.
The lower moon is a crescent which indicates a light source somewhat behind the planet and moon system.
Usually a gas giant's moons lie in the planet's equatorial planes as do the rings. Evidently these moons are orbiting in a different plane than the rings, else their gravitational influence would make a gap in their part of the ring.
It is a beautiful design but the two things I mention make it less believable (at least to me).