The document presents research by Gerges Francis Tawadrous, a physics student, on the interdependence of planetary orbital and rotation periods within the solar system. It discusses how the cycles of planets, particularly Mercury, Venus, and Earth, interact and influence each other, proposing that these motions can be viewed as a unified system. The findings suggest that the moon’s orbital and rotation periods are closely linked to the cycles of Mercury and Venus, emphasizing a harmonious relationship among celestial motions.