Since 1978 the Pioneer Venus mission was started by NASAOur knowledge of Venus has evolved greatly. In September 2020, scientists Find out the possibility of the presence of phosphine gas in the atmosphere of Venus, a condition that can allow life to develop. A few days ago, a recent study was published in natural astronomy Finally he suggests it Venus does not have enough water in its clouds To support any form of microbial life.
Do the clouds of Venus contain water?
John Hallsworth, a microbiologist at Queen’s University Belfast and lead author of the new study, explains: “We know, of course, that life needs water. The new results show that water concentrations in Venus’ clouds are a hundred times as low as there are even the most resistant microorganisms on Earth. Earth must be preserved. It is, a priori, an insurmountable limit. It is for what life ought to be active.”. Disappointment for some is obvious to others.
Venus has interested scientists for many years. In fact, in 1978, NASA We launched the Pioneer Venus mission, a spacecraft with an orbiter that was launched into the atmosphere of Venus. The first results showed that the atmosphere contains signs of deuterium, a heavy isotope of hydrogen that can result from the decomposition of water. It is from this observation that scholars He wondered if Venus never had more water أكبرEven if this water had not remained in larger quantities in the atmosphere.
The most powerful microbe on Earth won’t stand a chance on Venus
In September 2020, after detecting traces of phosphine in the atmosphere of Venus, a team of scientists hypothesized that water droplets at high altitudes could resist and Production of moist spores capable of maintaining the reproductive life cycle. If the planet’s surface is most likely infernal, its clouds appear to be stable and milder.
The new study by John Hallsworth, which made it possible to calculate the activity of water in the clouds of Venus located between 42 and 68 kilometers in height, comes to destroy the researchers’ hypothesis. Note that the water activity is at least 0.585 and at best 0.004. John Halsworth explained that: “The most drought-tolerant microbes on Earth won’t stand a chance on Venus”. They add that: “The atmosphere of a flower is saturated with hostile elements that may prevent cellular systems from working properly, such as sulfuric acid that dries out cells.”.
The researchers also calculated the water activity in Martian clouds: The results are comparable to the stratosphere on Earth. NASA recently announced Two new space missions to be launched to Venus in 2028. This will likely be an opportunity to learn more about this mysterious planet.