“The moon has a dark side that never sees the sun.”

The idea that the moon has a perpetually dark side, forever hidden from the sun's rays, is a common misconception that often stems from our limited view from Earth. Because the moon is tidally locked with our planet, we always see the same familiar face. This constant visibility of one side, and the complete invisibility of the other, led many to mistakenly label the unseen portion as the "dark side," implying it was eternally unlit.

In reality, both sides of the moon experience day and night, just like Earth. As the moon orbits our planet, it also rotates on its axis. This rotation ensures that over the course of its approximately 29.5-day cycle, every part of the lunar surface is exposed to sunlight. The "dark side" is more accurately referred to as the "far side," simply because it is the hemisphere that never faces Earth. Historical evidence, particularly from space missions starting with the Soviet Luna 3 probe in 1959 which first photographed the far side, definitively showed a terrain just as varied and sun-dkissed as the near side, albeit with fewer maria.

The persistent belief in a permanently dark side is largely due to the misleading terminology and our human perspective. Since we never observe the far side directly from Earth, it's easy to assume it remains in perpetual shadow. However, the celestial mechanics of the Earth-moon system dictate that the sun illuminates the moon as a whole, gradually moving across its surface as it rotates. Therefore, while one side may be dark to us, it is regularly bathed in sunlight.