Final answer:
The Earth-Moon system is considered a true curiosity due to the Moon's unique characteristics, such as its well-preserved impact history and geologically inactive surface, which provide insights into the early solar system's history.
Step-by-step explanation:
The statement that the Earth-Moon system is a curiosity in the solar system can indeed be considered true. The Moon offers an exceptional case in planetary science for several reasons. It serves as a significant benchmark for understanding the history of our planetary system due to its well-preserved impact history, which contrasts with Earth's dynamic and constantly shifting geological landscape. The formation of the Moon itself is subject to various theories, including the fission theory, which proposes that the Moon was once part of Earth.
Additionally, the fact that the Moon is geologically dead provides scientists with a window on earlier epochs of solar system history, allowing insights into the processes that have shaped not only the Moon and Mercury but also other members of the planetary system. Understanding the details of the Moon's properties, such as its lack of atmosphere and geological activity, is crucial when comparing it with Earth and other celestial bodies within our solar system.