A little history bout the Moon’s dark side
Around four billion years ago asteroids rained down on the newly formed moon tearing into the surface where the fractured crust is the thinnest molten lava seeps from the moon’s hot interior spreads out and giant pools and solidifies to form the scars we see today from the earth. Although, the moon rotates the earth’s gravity holds on to it so tightly that the same side faces the earth all the times, thus making the features on the far side of the moon a complete mystery. “For all of the history the far side of the moon was invisible to the earth. It is the back side and you cannot see it”, told a space scientist while talking to media. In 1959 a soviet spacecraft Luna 3 flies past the moon’s far side and photographed it for the first time. Astronomers expect to see the familiar dark and white patches but they were in for big surprise. When the scientists saw the pictures, they were completely shocked because the far side was completely different from the near side. It was saturated with the cavities which was a huge difference and no one was expecting that at all. The far side had still massive craters but it was uniformly pale and it seemed like no dark lava had bled out onto the surface at all. Scientists have been researching on the far side of the moon since then. One research of the National Aeronautics and Space Administration (NASA) tells this story. “the only solution we can come up with is there is a thickness between the crust of the near side and crust of the far side, the backside must be so thick that lava may not be able to come up through them and erupt out onto the surface, instead on the front side where the crust is very thin and lava can easily come up through the cracks and flow out onto the surface”, said by a NASA member. NASA research shows that the crust on the far side of the moon is 30 miles thicker than the near side. Now the question is why is so, why is the crust on the far side is so thick. NASA gives a credible explanation of this, that is the impact of Thea could have made two moons not one. According to the giant impact theory, 4.5 billion years ago there were two moons in the orbit of the earth. The smaller moon gradually followed its larger sibling and eventually the two moons mushed together and the smaller moon covered the far side of the larger moon.
New research gives some interesting facts about the mysterious asymmetry between the far and near side of the moon
Experts from the Earth life science institute (ELSI) at Tokyo institute of technology, the university of Florida, The Carnegie institution for science, Towson University, NASA Johnson space center and the university of New Mexico participated in the study. The new research suggests that this is because radioactive elements were distributed not uniquely. In particular regions the moon’s near side have concentration of radioactive elements like Uranium and Thorium unlike anywhere else on the moon. Thorium is highly correlated with other radioactive elements (Heat producing).