Our solar system has now reached the venerable age of approximately 4.6 billion years. Like each of us, it underwent the processes of gestation, birth, and rapid development during its childhood. However, unlike our own childhoods, the solar system's early years were exceptionally chaotic and awe-inspiring. In this tumultuous childhood, planets matured amidst turmoil; the giant planets, after their birth, embarked on an arduous journey to arrive at their present locations, while the terrestrial planets endured countless crises and tribulations in their growth. We cannot precisely determine the age of the Sun and the solar system; we can only obtain clues from ancient crystals in ancient meteorites. The oldest known solid material in the solar system crystallized approximately 4.567~4.568 billion years ago. This is the only exact time point we know of, and the Sun's true "birthday" is not far off from this time. Astronomers use this to gauge the lifespans of the major celestial bodies in the solar system. To this day, there are still many stellar remnants from the early solar system scattered among small celestial bodies. They are like fossils of time, encapsulating memories from the solar system's childhood.