Now Venus is a mostly dead planet with a 90 times thicker toxic atmosphere and surface temperatures of 864 degrees, which are hot enough to melt lead. It is often called the twin of the earth because the planets are of similar size. But the modern comparisons stop here.
However, a recent study compared five climate simulations of Venus' past and each scenario suggested that the planet could support liquid water and a temperate climate on its surface for at least three billion years. Like the other planets in our solar system, Venus formed 4.5 billion years ago.
These temperatures could have been a maximum of 122 degrees Fahrenheit and a minimum of 68 degrees Fahrenheit.
Between 700 and 750 million years ago, something triggered the release of carbon dioxide from rocks on the planet and changed its climate.
The ocean was the first proposed by the NASA Pioneer Mission in the 1980s. However, since Venus is the second planet in front of the Sun, it was not considered conducive to the preservation of an ocean.
Venus receives more sunlight than Earth, which evaporates liquid water, sends hydrogen into space, and traps carbon dioxide. This would lead to a permanent greenhouse effect that would create the current toxic atmosphere. The topography of Venus has been completely altered by volcanic eruptions, most likely occurring in lowland and potential ocean basins over the last billion years.
Of the five simulations, three contained the current topography of Venus, adding a depth of 1,017 feet to the ocean, a shallow 32-foot ocean, and traces of water in the ground. The researchers compared this with two other simulations that used an Earth topography with a deep ocean and an oceanic world.
To restore the probable conditions on Venus, which occurred 4.2 billion years ago and changed over time, they gradually increased the solar radiation to reflect the sun as it warmed. This also changed the atmospheric conditions over time.