Moon 85m years younger than thought, was home to magma ocean

Rodiano Bonacci
Luglio 18, 2020

A new study has postulated that previous estimates of the moon's age were millions of years of rest.

According to the scientists, the moon's exact age is in remarkable agreement with an age previously determined for the formation of Earth's metallic core with the uranium-lead method, the point at which the formation of planet Earth was completed.

Scientists have long estimated the moon formed some 4.51 billion years ago when a Mars-sized object (which we've since dubbed Theia) smashed into Earth.

Theia is named after one of the titans in Greek mythology, known as the mother of the moon goddess Selene.

A research team including scientists from the German Aerospace Center and the University of Münster, has devised a new numerical model to recalculate the birth date of the moon, and the results showed that it is 85 million years younger than it was previously thought. Nothing remains of the protoplanet.

Samples returned from the moon for the duration of the Apollo missions and Soviet Luna robototic missions have not served to offer info for an specific age of the moon.

The energy that resulted from the agglomeration of rocks created an ocean of magma on the surface of the rising moon. It's been more than 50 years since we first set foot on the lunar surface, and we still have a lot to learn. So scientists have experienced to check out other procedures. Recognizing how very long that process of crystallization took clued them into how aged the moon certainly is. This new study suggested that those models were millions of years off. Its formation, its massive magma ocean, and subsequent cooling were estimated to have begun around 4.51 billion years ago.

But how to re-generate a procedure that took put throughout the pretty beginning of the photo voltaic system's existence?

All of those models have found that it took the moon almost 200 million years to cool off from its molten shape and create what we now know as the lunar crust. That element required a "fantastic deal of imagination and creativity", the scientists reported.

They calculated how the composition of the magnesium- and iron-rich silicate minerals that formed during the solidification of the magma ocean changed over time.

The scientists also wanted to determine the composition of the historical minerals that fashioned when the ocean solidified.

This finding is significant because it allowed the authors to link the formation of different types of rock on the moon to a certain stage in the evolution of its magma ocean. Which is close to the time Earth's core settled, the researchers said.

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