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In a new planetary science study published in the British journal Nature Communications on the 21st, a team of Japanese astronomers confirmed that the moon was bombarded by meteoroids (2021 hermes bags) about 800 million years ago. The study of crater scaling law and collision probability shows that an asteroid of more than 400 million billion kilograms collided with the earth.
The process of erosion and surface renewal on the Earth has made it difficult for scientists to study ancient meteoroid impacts and to determine their dates. However, there is another way to understand these impacts, and that is to study craters on the moon, because on the moon, the effects of weathering and erosion are greatly reduced. Astronomer Terada Kentaro and his colleagues at Osaka University in Japan used data from the lunar probe "Lunar Goddess" of the Japan Aerospace Exploration Agency to estimate the formation time of 59 craters with a diameter of more than 20 kilometers on the surface of the moon. The "Moon Goddess" probe was launched in 2007, and its success helped Japan take the first step on the road to the moon. The "Moon Goddess" carries as many as 15 kinds of observation instruments, which can analyze the chemical composition of the moon, mineral distribution, surface characteristics, etc., and the data collected by it are used to study the origin of the moon and help infer the evolution of the earth. According to the data from the probe, the research team found that out of 59 craters larger than 20 kilometers, 8 craters were formed at the same time, including Copernicus crater. Based on the radioactive dating results of the material released from the Copernicus crater and the data obtained from the impact glass chondrules (glass beads formed by meteorite impact) of some Apollo missions, they concluded that the moon is about 800 million years old I experienced an asteroid rain before. According to the collision probability, the research team analyzed that the total mass of these meteoroids was about 30 to 60 times that of the meteorite that caused the Chicxulub impact before the ice age (about 720 million to 635 million years ago). At the same time(replica hermes), the researchers speculated that since asteroid rain has occurred on the moon, a similar event must have occurred on the earth. They used the crater scaling law and collision probability to show that a mass of 400 million to 5 billion. The asteroid of billions of kilograms collided with the earth.
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