The discovery of strong evidence that the "brother of the Earth" is volcanically active
A new research paper has provided strong evidence that Venus is geologically active, helping to answer a long-standing question about what is going on inside its 'sister Earth'.
Venus has always been of interest to scientists because it is similar to Earth in terms of size and mass, but it is significantly different from our planet in that it does not contain the tectonic plates from which volcanic activity on Earth originates.
Scientists were not previously able to know for sure whether there is geological activity beneath the surface of Venus. Scientists now believe they may have found strong evidence that Venus still has volcanic activity, after finding what appear to be remnants of eruptions and lava flows.
Scientists discovered a square-mile vent that appeared to change shape and grow over a period of eight months, in 1991.
What had been a circular formation of a square mile became, after eight months, an irregular shape 50 percent larger.
Scientists believe that the most likely explanation is that the lava came out of a volcanic vent, which is part of the "Maat volcano" system, one of the largest mountains of Venus.
The team believes that these jets may have formed a lake in the eight months between the two images, although it is unclear if they were liquid or cooled to a solid state.
"We can now say that Venus is volcanically active right now, meaning there are at least a few volcanic eruptions every year," said Robert Herrick, research professor at the University of Alaska's Fairbanks Institute of Geophysics. "And we can expect upcoming Venus missions to monitor new volcanic flows that are being generated." It's happened since the Magellan mission ended three decades ago, and we should see some activity happening as the two upcoming orbital missions collect the images."
The new discoveries were found in radar images of the planet taken by the Magellan spacecraft between 1990 and 1992.
Although the images are old, it has taken him so far to dig through them and successfully find changes in features that indicate activity below the surface.
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