Scientists are beginning to believe that Venus was probably never able to support life, as it appears that there were no oceans of water on the planet's surface (although experts believed this until now).
Venus is often referred to as Earth's "evil twin" because it was once thought to be very similar to our planet. However, new research shows that Venus has always been a planet with extremely high temperatures and its conditions have never resembled those on Earth.
The research was conducted by a team of scientists from the University of Cambridge. They came to their conclusions by examining the chemical composition of Venus' atmosphere.
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These findings could help in the study of systems beyond the solar system. They could help astronomers select and study "exoplanets" that are more likely to be habitable.
"Although it is the closest planet to us, Venus is important for exoplanet science because it gives us a unique opportunity to explore a planet that evolved very differently from our own, right at the edge of the habitable zone," said team leader Tereza Constantinou.
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Currently, Venus's temperature reaches 500 degrees Celsius, which means it can melt even lead. The planet also has clouds of sulfuric acid.
Despite these extreme conditions, many scientists had thought that Venus could have been habitable billions of years ago. Much of the research into this question has focused on water, which is the key ingredient for life.
There are two main ideas about how Venus might have evolved over the past 4.6 billion years. One suggests that the planet was once cool enough to support liquid water. According to this theory, this state changed due to an invisible greenhouse effect caused by volcanic activity. As a result, Venus gradually became hotter and hotter, until it could no longer support liquid water.
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The other theory suggests that Venus never had liquid water because the planet was warm to begin with. The results of the new research seem to support the second theory.
"Both of these theories are based on climate models, but we wanted to take a different approach based on observations of Venus' current atmospheric chemistry," Constantinou said. "To keep Venus' atmosphere stable, any chemicals removed from the atmosphere would have to be replenished, as the interior and exterior of the planet are in constant chemical communication with each other."
Specifically, the researchers looked at how quickly water, carbon dioxide and carbonyl sulfide are destroyed in Venus's atmosphere and, therefore, how quickly they must be replenished from the planet's interior.
By conducting research and comparing the findings with those on Earth, scientists concluded that the interior of Venus is very dry and could never have had enough water to have oceans on its surface.
"We won't know for sure whether Venus can support life until we send probes to it later this decade," Constantinou said. "But given that it likely never had oceans, it's hard to imagine that Venus ever supported Earth-like life."
Humanity may not have to wait long to answer that question. DAVINCI NASA's is expected to launch in June 2029 and arrive at Venus two years later.
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Despite this disappointing news about Venus' past, scientists remain optimistic about its future. With continued exploration efforts and advances in technology, there is still much to learn about this mysterious planet. It is possible that many secrets lie beneath its thick clouds. Further research and exploration of Venus has the potential to reveal important insights into the evolution of planets and life in our solar system.
Source: www.space.com
