Scientists Provide New Explanation for the Far Side of the Moon’s Strange Asymmetry

The composition of the Moon’s near side is oddly different from that of its far side, and scientists think they finally understand why. (Credits: NASA/NOAA)

TOKYO (Earth-Life Science Institute PR) — Earth’s Moon has a ‘near side’ that is perpetually Earth-facing and a ‘far side’, which always faces away from Earth. The composition of the Moon’s near side is oddly different from its far side, and scientists think they finally understand why.

The Earth-Moon system’s history remains mysterious. Scientists believe the two formed when a Mars-sized body collided with the proto-Earth. Earth ended up being the larger daughter of this collision and retained enough heat to become tectonically active. The Moon, being smaller, likely cooled down faster and geologically ‘froze’. The apparent early dynamism of the Moon challenges this idea.

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Apollo 8 and Beyond – The Next Epoch

Frank Borman, Jim Lovell and Bill Anders looked back after leaving Earth orbit for the Moon. This view extends the northern hemisphere to the southern tip of South America. Nearly all of South America is covered by clouds. (Credits: NASA)

By Stephanie Zeller
NASA’s Goddard Space Flight Center, Greenbelt, Md.

Half a century ago, Apollo 8 ushered in a new era of space exploration. The missions that followed in close succession would herald these breakthroughs in science and in engineering prowess with drama and color. They would bring a cornucopia of knowledge about the Moon, the origins of our solar system, the nature of our universe, the history of our Earth and even the history of life. In addition to tangible, scientific assets gained from Apollo, the mission brought some degree of unification to a nation fractured by conflict at home and abroad.

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