A solar system is a collection of celestial bodies that orbit a star. The most well-known example is our own Solar System, which includes the Sun, eight planets like Earth, and numerous moons, asteroids, and comets. These objects are held together by the star's gravitational pull. Each solar system can vary in size and composition. Some may have more planets, while others might contain gas giants or rocky bodies. Solar systems can also include dwarf planets, such as Pluto, and are often found within galaxies, like our Milky Way.