Meteorite , as a "outsider", has always been given various legendary colors. Some people exaggerate the efficacy of meteorites because they carry "mysterious matter" from other planets, while others are also afraid that meteorites may damage the body with "unknown genes".
Since the existence of the earth, meteorites have been constantly patrolling the earth. They land randomly in every corner of the earth: deserts, oceans, jungles, and of course cities.
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Meteorites are frequent visitors on the earth. Sima Qian once had an accurate definition of meteorites. He wrote in the "Records of the Grand Historian" Tianguan Book: "A star falls to the earth and will be a stone." Therefore, meteorites refer to fragments of solar system celestial bodies outside the earth. They pass through the earth's atmosphere and naturally fall to the earth to become meteorites.
Where does the meteorite come from?
Regarding the source of meteorites, research believes that it mainly comes from the asteroid belt between Mars and Jupiter , and partly comes from the moon and Mars.
First, let’s look at lunar meteorite . After the moon is hit by an asteroid, the moon's matter enters the earth-moon space and then falls to the earth to form a meteorite.
According to the lunar samples brought back by Apollo , many of the lunar matter are very different from those of asteroids. Through the comparison of these matters, lunar meteorites can be determined.
and then Mars meteorite.
After Mars was hit by a huge impact by an asteroid, rock fragments escaped Mars' gravity, part of which entered the gravity range of the earth, and finally fell to the ground to become Mars meteorite . There are 15 Martian meteorites discovered so far, 5 of which are landing types, 6 are found in Antarctica, and 4 are found in deserts. Martian meteorites are all aschondria.
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