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The moon is older than thought

2023-10-24 17:25:27Lifestyle SHKRUAR NGA REDAKSIA VOX
The moon is older than thought
The moon is older than thought

The Moon may be 40 million years older than previously known and is thought to have formed 4.46 billion years ago.

This was discovered from moon crystals brought back to Earth by the astronauts of the Apollo 17 mission, the eleventh and last manned expedition of NASA's space program, which took place in 1972. The samples were analyzed at the atomic level by a group of researchers led by the Field Museum of Natural History and the University of Chicago. The study, published in the journal Geochemical Perspectives Letters, underscores the importance of the satellite's age, given its fundamental role in the evolution of life on Earth.

The moon is older than thought

The moon stabilizes the planet's spin axis and is why there are 24 hours in a day and why the tides occur. More than 4 billion years ago, when the Solar System was still young and the Earth was still growing, a Mars-sized object crashed into the globe, and from that collision the Moon was born. "The energy of the impact melted the rock that would later become the surface of our satellite, so all the collected crystals must have formed after this lunar magma ocean cooled," explained Philipp Heck, coordinator of the study.

To find out the age of the fragments, the researchers used a technique called atom probe tomography: “We started by sharpening a piece of the lunar sample until we got a very sharp piece. We then used a laser to vaporize the atoms from the surface. The speed at which the atoms move tells us how heavy they are, which in turn tells us what they are made of," added project leader Jennika Greer. Understanding the exact composition of the crystals is essential to trace the moment of their formation and therefore the real age of the Moon.


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