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During the night of August 19 to 20, 2025, a “fireball” crossed the sky in Japan. Meanwhile, Different hypotheses are put forward regarding its characteristics, even if they will still have to be confirmed. Meanwhile, An expert in Ciel Vigie explains what we already know about this phenomenon.
During the night of August 19 to 20, 2025, a strange “fireball” crossed the night sky of Japan. Therefore, Filmed by several Internet users, as well as by Japanese television cameras, she caused fascination and questioning. In addition, But scientists had expressed themselves little, with little information about it.
Today, on August 21, 2025, the information available, although being confirmed, began to clarify. In addition, Karl Antier. Additionally, In addition, geophysicist for Ciel Vigie, a participatory science program to report the meteors, shooting stars and other celestial phenomena, answered questions what do we know about from Numerama.
The hypotheses around this “fireball” in Japan
If the hypothesis of an object of human origin. like a piece of satellite for example, could be mentioned, Karl Antier explains to us that the data collected dismiss this hypothesis: “In view of the speed of the asteroid, which was 19 km per second, it is certain that it is not an object of anthropogenic origin, but rather an object which is not of terrestrial origin, most likely coming from the asteroid belt between Mars and Jupiter. »»
To determine its composition and size, scientists analyze the energy released by the object. Here, from this energy, scientists think that the object weighed 20 tonnes. Two probabilities then followed: “Either it is a rock. in this case its size should be about 2 meters in diameter, or it is a metallic object, more dense therefore, and whose diameter is below the meter”develops the geophysicist with Numerama.
Finally. given the trajectory that we could observe, the pieces fallen on earth most likely ended at the bottom of the peaceful ocean.
Karl Antier also confirmed to us that the light phenomenon had arrived “Largely at the level of the shine. of the full moon” – It was therefore particularly bright.
A what do we know about frequent and possible phenomenon also in France?
According to the scientist, this kind of event arrives on average twice a year. The last comparable event in France occurred in February 2023 in Saint-Pierre-le-Viger. about thirty kilometers from Dieppe, where a bite of meteorite had fallen and had been found by a research team.
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