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Aug 11, 2016 · Credits: NASA. Venus may have had a shallow liquid-water ocean and habitable surface temperatures for up to 2 billion years of its early history, according to computer modeling of the planet’s ancient climate by scientists at NASA’s Goddard Institute for Space Studies (GISS) in New York. The findings, published this week in the journal ...
- Rob Garner
Sep 22, 2019 · At 4.2 billion years ago, soon after its formation, Venus would have completed a period of rapid cooling and its atmosphere would have been dominated by carbon dioxide. If the planet evolved in an Earth-like way over the next 3 billion years, the carbon dioxide would have been drawn down by silicate rocks and locked into the surface.
Sep 23, 2019 · It's believed that Venus may have been a temperate planet hosting liquid water for 2 to 3 billion years before a massive resurfacing event about 700 million years ago triggered a runaway ...
Aug 8, 2016 · But there's one big caveat: for this model to produce habitable conditions for a 2-billion-year stretch, Venus had to have been spinning as slowly as it is today - something that researchers are yet to prove. And since Earth's rotation has been steadily slowing down, some researchers have argued that Venus did in fact spin faster in the past.
May 6, 2024 · Advertisement. Together the new HCO + mechanism and the previously modeled water-loss processes could have enabled Venus to lose its water in half the time, a relatively brisk 600 million years, the researchers say. If so, Venus may have held onto its oceans until much more recently, perhaps 2 billion to 3 billion years ago.
Feb 20, 2024 · If ancient Venus had much more water, they explain, it would either have more oxygen, too much carbon monoxide, or a surface that — 1.5 billion years after the modeled onset of Venus’ runaway ...
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Aug 28, 2020 · This visualization of Simulation 28 shows surface air temperature (Celsius) 2.9 billion years ago for a hypothetical Venus having a nitrogen (N 2)-dominated atmosphere with .25-bar surface pressure and an Earth topography with a 310-meter deep ocean. It was the most Earth-like of the 45 simulations, even allowing for the possibility of snow at ...
