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Venus has never had an ocean

While some scientists believe that Venus may have had an ocean in the past, a new study suggests otherwise. According to a study published in the October 13 issue of the journal Nature, a group of researchers say that their computer models show that the planet Venus has been without an ocean from the beginning.

Venus itself formed 4.5 billion years ago with the sun, Earth and other objects in our solar system. Like young Earth, young Venus was probably covered in magma or molten rock. But before it rained, the planet and its atmosphere had to cool, and if it rained like the earth, it would take thousands of years for water to collect in the oceans.

In the early days of the solar system, the sun was 30 percent It was weaker than it is now. But according to a new study, despite less sunlight hitting the young planet Venus, it is still very hot and does not allow the oceans to form.

Even if the clouds were thick enough to block sunlight And lower the temperature, the situation is different. Clouds, for example, could have prevented temperatures near the surface of Venus from falling. The planet is still exposed to the sun.

  • The length of the longest day in the solar system was measured more accurately

Venus rotates slowly, and its day is about the same as its year, so the clouds on Venus' day do not cool it enough to make it rain. Even as these thick clouds trapped heat near the surface of Venus, they formed a greenhouse effect that further heated the planet's surface, melting even lead today.

Scientists say In this study, the high surface temperature of Venus means that there is water only in the gaseous state near the surface of the planet, and therefore there is no rain or ocean.

BingMag.com Venus has never had an ocean

Graphic Design of a Planet without Venus in the Early Formation of the Solar System
Credit: Manchu

Comparison Earth and Venus

Scientists are trying to learn more about the primitive atmosphere of Venus and Earth. "We simulated the Earth and Venus climate at the beginning of its evolution, more than 4 billion years ago, when the surface of the planets was still molten," said Martin Turbet of the University of Geneva. "The high temperature recorded means that like water, under a giant pressure vessel, every water was in the form of steam." "If it was closer to the sun then or the sun was as hot as it is today, water on Earth might have existed only as steam," said Emeline Bolmont of the University of Geneva. "This is a complete shift in our view of what has long been called the paradox of the weak young sun and has been seen as a major obstacle to the emergence of life on Earth."

The argument was that if the sun's rays Early in the formation of the solar system was much weaker than today, the earth must have turned into a lifeless ice ball. "But it turns out that for a young, very hot earth, this faint sun may have been an unexpected opportunity."

Future missions to Venus

Which view is correct? Previous studies have shown that Venus can have liquid water, or new simulations that make this unlikely? To answer this question, scientists hope that future missions will help determine more accurate models of Venus.

"Our results are based on theoretical models and a It is an important cornerstone in answering questions about the history of Venus. But we can not make a definite decision based on computer models. "So the observations of three future space missions to the planet are essential to confirm or disprove our work."

The confirmation of the two missions of Veritas and Da Vinci + to Venus, once again reminded the importance of exploring the planet. It remains to be seen what new information the results of close studies by future missions will provide to humans on the planet's past. p>


Source: EarthSky

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