What is included in the solar system?

The solar system is defined by the gravitational influence of the Sun, which is the central star. In this system, it includes not only the Sun itself but also all the planets, their moons, asteroids, comets, and other celestial objects that orbit the Sun. This means that the defining characteristic of the solar system is its relationship to the Sun and the objects that revolve around it due to its gravitational pull.

Option B accurately encapsulates this understanding by emphasizing both the Sun and the various planets as well as the broader array of objects that are part of the solar system. In contrast, the other options miss critical components or refer to entities outside of the solar system's definition. For instance, while option A mentions moons and stars, it does not specify that these objects revolve around the Sun, and stars do not belong to our solar system. Option C correctly lists stars and comets but again does not make the connection to the Sun's gravitational influence, which is crucial for defining the solar system. Lastly, option D refers to Earth and its geographical features, which do not pertain to the broader definition of the solar system at all. Thus, option B stands out as the most comprehensive and accurate description of what constitutes our solar system.