According to Australian researchers, the moon has been volcanically active for longer than previously thought, according to rock samples collected by the Chang’o-5 spacecraft in China, according to MTI.
a Changu -5 In December 2020, I collected 1.7 kilograms of rock on the Moon – four decades later, it was the first sample to come down to Earth from a celestial body.
Studies show that the samples, which are made of basalt, or igneous rocks formed by the rapid cooling of lava, are about 2 billion years old, so they are about a billion years younger than samples found previously, according to The Guardian.
a Science The research sheds new light on the history of the moon at a time when the celestial body was thought to be cooling and beginning its magnetic field, said Alexander Nemchin, a scientist at Curtin University and one of the authors of the study, which was published in the Scientific Journal. to weaken.
The basic theory is that small objects cool quickly, then die, and that’s it
The moon may have been cold at this point, but the age of the samples indicates the presence of some heat sources in the area, which explains later than expected volcanic activity.
Photo: Tpg / Getty Images Hungary
Accurate knowledge of the age of lunar rocks also helps researchers improve the technique for dating the surface of planets in cases where rock samples are not available. This technique estimates the age of the surface area based on the density of impact craters: Older and older surfaces have larger and more craters than younger areas.
The volcanic material was collected by lunar orbit in a large lava field called Oceanus Procellarum (Ocean of Storms). The number of pits can be linked to the exact age, and the age of other areas can be determined
Nemchin pointed out.
The Australian research team received two grams of a 1.7 kilogram sample for testing, which is kept at the China National Astronomical Observatory in Beijing. Experts in Beijing also conducted the tests.
China is the third country after the United States and the Soviet Union to bring moon rocks to Earth. This is the first time since 1976 that a soil sample from the Moon has reached Earth.
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