On Venus, life could exist – this statement was made by scientists from the University of Wisconsin in Madison.
Astrophysics looking for signs of organics on exoplanets, located hundreds of light years from Earth. But perhaps they need to look at our nearest neighbor.
A new study says – in the clouds on the lower atmosphere of Venus may have their own microflora. It is the source of the anomalous atmospheric phenomena, seen in ultraviolet images, reports .
Venus is always considered completely uninhabited. Too unfavorable the conditions are a temperature of about 465 degrees Celsius and atmospheric pressure 92 times higher than the earth, in some places, rains of sulfuric acid. In such a world will not survive the most simple of bacteria.
But at the altitude of about 50 kilometers, the situation is different. The temperature there is already 0-60 degrees Celsius, pressure of 0.4 – 2 atmosphere.
The study authors noted that small organisms can be detected in the Earth’s atmosphere at altitudes up to 15 kilometers. It is the bacteria, mold spores, pollen and algae trapped there as a result of evaporation or discarded in any disaster.
Something similar could happen on Venus. Once at high altitude, the microorganisms would fall into the so-called “habitable zone” suitable for life.
From Jupiter to the edge of the UniverseFive most important discoveries of Hubble Water vapor remaining from ancient times when Venus had liquid water, carbon dioxide, compounds of sulfuric acid and UV-light would give the microbes food and energy.
The scientists ‘ theory is indirectly confirmed by the images of the neighboring planet. In the UV range shows that the dense clouds that cover the entire surface is “decorated” with dark spots and streaks. They were first spotted in 1927. According to scientists, something that absorbs 40% more UV light than the surrounding region. The true nature of this phenomenon is still unknown – it is theoretically possible to assume that there is indeed located in the habitable zone.
The size and contrast of the spots can vary over several days or weeks to travel long distances. On Earth, similar processes caused by weather factors, but Venus is not our usual change of seasons and temperature changes.
Scientists have noted that such conduct “spots” is most similar to the life cycle of microbes that bloom and die, and drift and migrate in the atmosphere. Perhaps they are similar to earth Acidithiobacillus ferrooxidans or Stygiolobus that feed on sulfur, resistant to acid and absorb UV radiation.
Previous studies have shown that in the atmosphere of Venus, where the conditions are much milder than on the surface, could theoretically survive 1.4 billion tons of biomass (as found in all the oceans of the Earth).
The authors stressed that the answer to all questions will only mission to Venus. Yet no spacecraft could not take samples of the atmosphere of this planet and has not conducted long-term measurements. But in the future things will change: the US and Russia are planning a joint research project, the launch of which is scheduled for 2026.