The Moon’s far side is not darker, but it is rougher: its crust is about 60 kilometres thick versus 40 on the Earth-facing side, so ancient impacts struggled to punch through and flood it with the dar
Scientific analysis explains that the Moon's far side appears different from the near side due to a thicker crust that prevented volcanic activity. The far side is not permanently dark, but its geological composition remains distinct due to tidal locking and ancient impact history.
Why it matters
Understanding lunar geology is essential for future space exploration and mission planning, particularly regarding landing sites and resource availability.
The far side's thicker crust impeded magma, but GRAIL and Chang'e-6 show that heat, chemistry and lithospheric cooling also shaped the Moon's unequal faces.
By Lachlan Brown · Edited by Lachlan Brown
The Moon’s far side spends as much time in sunlight as the hemisphere facing Earth. What makes it look different is geology: densely cratered highlands dominate the hidden face, while broad dark volcanic plains cover much of the familiar one.
NASA summarises one major difference by describing far-side crust about 60 kilometres thick and near-side crust about 40 kilometres thick. Those are representative rounded figures, not uniform shell measurements. Modern gravity models give lower global averages and enormous local variation, but agree that the far-side crust is substantially thicker.
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