An asteroid exploded suddenly! Scientists as far away as the Earth are stunned and incredible2019-01-31 10:26:19 93 ℃
Human exploration of the outer space has been continuing. For example, the United States has launched Voyager 1 and Voyager 2 spacecraft on the earth. These spacecraft have been flying in the solar system for many years and now have reached the edge of the solar system. If not unexpectedly, it will not take many years to really cross the solar system, and then we humans will be real. What is really beyond the solar system? Apart from the earth, is it an empty and dead world? Comets
are a kind of strange celestial bodies in the solar system, which contain the mystery of the origin of the solar system. Scientists have long been interested in comets. On March 2, 2004, the European Aeronautical Administration launched the Rosetta Comet Detector to detect comet 67P/Chuliumov-Grahimenk (comet 67P). This is the first close comet exploration project in human history. The great task of
lasted for 12 years until last September 30, when Rosetta collided with Comet 67P. Although Rosetta has finished his mission, the vast amount of valuable data it collects is enough for scientists to study for more than a decade.
However, the latest discovery by scientists on Comet 67P is a strange phenomenon-sand dunes deposited by wind. This means that there is a wind on Comet 67P, which is quite unexpected. After all, comets don't even have atmospheres, so how can they generate enough dense winds to form such dunes? To reveal the secret behind it, researchers from the University of Pierre and Maricurie (UPMC) analyzed the photographs of comet 67P and made computer simulations.img src="/1ydzximg/0LCI89jG8O"/>p>These changes are neither unique transformation phenomena nor long-term change processes, but are related to different geological activities: local weathering and erosion, sublimation of ice, and mechanical stress due to comet rotation. Weathering phenomena occur everywhere in comets. As long as solids become fragile due to the alternation of day and night or seasonal cold and heat, they appear cracks
Rosetta detector OSIRIS wide-angle camera records a sudden brightening of the comet's surface. After two hours, the ultraviolet brightness and ejected dust reflected by the comet's sunlight increase to six times, the same as before. At the same time, the gas and plasma around the Rosetta detector increased to 1.5-2.5 times, respectively.
and according to their research, the Rosetta spacecraft two years ago had an incredible bending shock wave on Comet 67p, which scientists thought might be caused by a mysterious magnetic field. When they came to the conclusion that comet 67p had an arc shock wave, many people wondered why comet 67p had an arc shock wave. In fact, it is not surprising that, with strong magnetic fields, the natural magnetic field of celestial bodies can resist the arc of shock waves generated by the solar wind.
It is only surprising that when the Rosetta spacecraft did not approach the comet, scientists did not find that there was a shock wave on the comet, but after approaching, it formed an extremely strong arc shock. Bo, this shows that when the Rosetta spacecraft arrived at the surface of the comet, the magnetic field on the comet suddenly became stronger. What's the reason? It's amazing. What do you think about it?
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