The Moon's orbit is not fixed and changes over time due to various factors, including its tilt relative to the Earth's orbit and tidal forces from the Sun. These changes result in the Moon's distance from Earth increasing by about 4 cm per year, along with cyclical variations in its orbital properties. Eclipses do not occur every month because the Moon's orbit is tilted by approximately 5 degrees, preventing regular alignments of the Sun, Earth, and Moon. While the Moon's orbit varies, these changes are generally negligible over a human lifetime. Overall, the Moon's orbital dynamics are complex and influenced by multiple celestial factors.