Final answer:
The statement is true; our solar system contains only one star, the Sun. While Kepler's laws assume an isolated system, they generally hold true even when other massive objects are present, with some perturbations.
Step-by-step explanation:
The statement that our solar system contains only one star is true. Our solar system consists of the Sun, which is the central star, and the planets, including Earth, that revolve around it.
While our Sun is a single star and not part of a binary system, it is important to note that many stars in the universe are part of such binary systems. Despite this variety, our solar system has just one star at its center, the Sun.
In terms of Kepler's laws of planetary motion, while these laws describe the motion of planets around our Sun, they do assume that the planet-satellite system is fairly isolated.
However, astronomical observations have confirmed that these laws are generally applicable even in the presence of other massive objects, though there can be slight perturbations due to gravitational interactions.