Scientists have speculated about the possibility of suitable conditions for the emergence of life forms on Venus because it is the closest planet to Earth and shares many characteristics with it in terms of size and mass, despite the huge difference in temperature that reaches 470 degrees Celsius on the surface of Venus, and the composition of the atmosphere consisting of 97 percent of carbon gas.
In the new study, the results of which were published in the journal Nature, scientists used climate models – similar to what researchers use when simulating climate change – to go back in time in the age of the planets Earth and Venus.
According to scientists, hot molten torrents were flowing on both planets 4 billion years ago, and therefore oceans can only form when temperatures drop, leading to condensation of water in the atmosphere and precipitation over thousands of years, which happened only to the Earth, while the planet remained. The flower is hot.
The scientists noted that the Sun was 25% lighter than it is now, but that wasn’t enough to help Venus get the right coolness, as happened with Earth.
‘Unexpected role of clouds’
The researchers tried to answer whether clouds might play a role in helping Venus get cold, but according to their climate model, clouds contributed in an unpredictable and opposite way to Venus’ staying warm.
The clouds were gathering on the dark side of the planet, so the part exposed to the sun in Venus, which was rotating at a very slow rate, made the “night clouds” contribute to the global warming phenomenon within the planet’s atmosphere, which kept temperatures high, and this prevented rain, And the water remains in its gaseous form confined to the atmosphere.
Martin Turbet, the study’s lead supervisor and researcher in the Department of Astronomy at the College of Science and a member of the National Center for Efficiency at Research PlanetS Institute in Switzerland, believes that the planet Earth was likely to meet the same fate as Venus if it were a little closer to the sun or if the density of the sun at that time was the same right Now.
According to the study, the weakening of the sun’s density billions of years ago helped the Earth become cooler and get rid of its molten state, and in the emergence of oceans and seas.
A researcher at the University of Geneva, Emeline Boulemont, who participated in the study, explained: “This study shows that the error of the theory that the fading sun was the main obstacle to the non-appearance of life on Earth, but the opposite is true, as perhaps the fading of the sun gave us a chance unpredictable life on this planet.
Turbet points out that the study reveals that the planets on which water bodies appeared later dried up due to the lack of density in their atmosphere, which prevented the formation of their first oceans, as happened on Earth.
Chris Mackay, an expert at the US space agency, NASA, believes that the three spacecraft that will explore Venus by 2030 will confirm data related to temperature, pressure and water dimensions, while allowing an understanding of the planet’s history.
The James Webb Space Telescope is also scheduled to launch next December, which may help future missions to Venus to test the theory put forward by Turbit and his team.