“The moon has a dark side.”

It's a common misconception that our moon possesses a permanently "dark side." While it is true that we only ever see one face of the Moon from Earth, the idea that it has a perpetually unlit hemisphere is a pervasive myth. The Moon is tidally locked with Earth, meaning its rotation period matches its orbital period around our planet. This phenomenon ensures that the same lunar hemisphere always faces us, leading to the popular but inaccurate notion of a hidden, dark half.

The origin of this myth likely stems from the fact that humans on Earth never observe the entire lunar surface. Before space exploration, the far side remained a mystery, unseen by human eyes. This lack of visual information, combined with the poetic license often taken in literature and popular culture, led many to assume that the unseen side was perpetually shrouded in darkness. However, telescopes and early space probes quickly revealed that this hidden hemisphere is just as exposed to the sun's rays as the side we regularly observe.

In reality, both sides of the Moon experience a full cycle of day and night, each lasting approximately two Earth weeks. As the Moon rotates on its axis and orbits our planet, sunlight illuminates its entire surface over the course of a lunar month. The side we never see is more accurately referred to as the "far side," not because it's dark, but because it's simply out of our direct line of sight. Spacecraft have extensively photographed this far side, revealing a heavily cratered landscape, distinct from the maria-rich near side.