Scientists have said lunar dust collected in 1972 shows the moon is older than they thought. Here's what you need to know.
That was the year astronauts Eugene Cernan and Harrison Schmitt, the first scientist-astronaut, became the last humans — so far —
They collected a total of 110.5 kilograms of lunar rock and soil — 741 samples in all. The samples include the three major lunar rock types: basalt, breccia and highland crustal rocks.It now seems to have formed about 4.46 billion years ago — putting its formation within the first 110 million years of the birth of our solar system.
Zircon is also the oldest mineral known to exist on Earth and, as such, geologists say, it holds vital information about the formation of our planet and life as we know it. That created what is known as the Lunar Magma Ocean — a theory that, the scientists said, explains the composition of the moon's interior.
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