A research team from the University of Bern has found new evidence that Venus is geologically active – and thus refutes a rather widespread acceptance.
For a long time, Venus was considered a geologically “dead” planet. Unlike the earth, according to the common doctrine, there is no active plate tectonics – no large -scale movements of the outer layers of rock. However, researchers around the geophysicist Anna Gülcher from the University of Bern have now discovered evidence that indicates active tectonic processes under the surface of Venus.
Dynamics, similar to on earth
The study was published on Wednesday evening in the renowned Journal Science Advances. According to Bern University, the analysis shows that Venus has signs of geological dynamics – similar to the earth, albeit in a different form.
Coronae provides information
In the middle of the research, it is reported in this way Coronae -ring -shaped structures of errors and fractures that often occur on Venus, but do not occur on earth. The research team was able to identify a total of 740 of this coronae – considerably more known than before. The researchers 75 of the largest structures that were mainly analyzed in detail, some with a diameter of up to 2500 kilometers of this roughly corresponds to the North-South expansion of the US.
According to the researchers, the Coronae mainly appear in regions where the Venus crust is thinner. The team assumes that there will be hot material from the inside of the planet. This mantel material that is so authorized can protrude the crust and trigger movements on the edges, in which parts of the crust, among other things, push areas – a process that is reminiscent of subduction on earth, because it acts as part of the plate tectonics.
Oude NASA -Data reinterpreted
The analysis is based on data from the Magellan spacecraft, which Venus mapped for the US Room Trip Authority NASA from 1990 to 1994. This data has now been evaluated again with the help of modern methods, including topographical and gravimetric analyzes.
The discovery could not only bring about a revolution in the concept of Venus, but also makes it possible to draw conclusions about the early geological development of the earth. The researchers suspect that comparable coronae can also exist on the young earth- before the global flat tectonics that is known today has established itself.
Source: Krone
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