The water tchouri has nothing to do with the Earth – Linformatique.org

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According to the results <- - Easy AdSense Pro V7.30!> of the instrument of Rosina Rosetta, the water of the comet 67P / Churyumov-Gerasimenko would have nothing to do with the Earth’s ocean water.

If the presence of water on the Comet 67P / Churyumov-Gerasimenko is not a surprise, that it does not match that of the Earth’s ocean water is. Indeed, it was accepted that the water on Earth came from comets, there are millions of years.

To understand the discovery of the scientists in charge of the instrument of Rosina, he Be aware that the water can differ according to its ratio to normal molecules and heavy molecules, that is to say between the hydrogen compound molecules (H2O) and deuterium (HDO). Researchers have discovered that this ratio tchouri is three times higher than that of the Earth’s ocean water.

While it is the one of the first scientific results published about the Rosetta mission, the first results already upset the established ideas who wanted the water on Earth is outcome of comets that crashed on our planet. According Kathrin Altwegg, University of Bern, the most likely scenario is that the water on earth is coming on board asteroids, not comets.

“Today, asteroids are very limited in water, it is obvious. It probably was not always the case, “says the scientist. Referring to the first period of the solar system, there are 3.8 billion years, when the asteroids are believed to have regularly crashed to Earth in what is called the Late Heavy Bombardment, it states that “At that time, asteroids could very well have a lot more water than they have today. “

While this first conclusion results of the measures already made by Rosina instrument, scientists are considering take other measures so that the comet 67P / Churyumov-Gerasimenko goes approach the Sun, so start spitting more water vapor and dust in space.