Venus may have had a perfectly habitable environment for 2 to 3B years after the planet formed, suggesting life would have had ample time to emerge there, according to a new study. - NBCNewsMACH
Creating the different simulations involved adapting a 3D general-circulation model, which accounted for atmospheric compositions as they were 4.2 billion years ago and 715 million years ago, and as they are today. The model also accounts for the gradual increase in solar radiation, as the sun gets warmer over the course of its lifetime.was similar to what it is today.
"Venus currently has almost twice the solar radiation that we have at Earth. However, in all the scenarios we have modeled, we have found that Venus could still support surface temperatures amenable for liquid water," Way said in the statement. However,"something happened on Venus where a huge amount of gas was released into the atmosphere and couldn't be re-absorbed by the rocks.", Venus would have undergone a period of rapid cooling.
While the exact cause of the outgassing event is still unknown, it's possible that it's linked to the planet's. As magma and molten rock bubbled up to the planet's surface, large amounts of carbon dioxide would have been released back into the atmosphere. If the magma had solidified before reaching the surface, it would have created a barrier and prevented gas from being reabsorbed, the researchers said.
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