[ad_1]
Without water, that's a lot, it would not be with life on earth. However, as water has come to earth?
A widely accepted theory assumes that most of the water was brought by asteroids striking the young earth. The researchers concluded that the fact is that the chemical signature of water is similar to that of asteroids and oceans of the Earth.
But now, researchers have found evidence of another source of water from the earth. It could at least partly also come from clouds of dust and gas from the still young sun. The team led by Peter Buseck writes of Arizona State University in the "Journal of Geophysical Research: Planets". In addition, researchers believe that our planet contains much more hydrogen – a component of water – than previously thought.
Test your knowledge! NASA satellite image-Quiz: Click day and night
Buseck and his colleagues argue that the real chemical signature of the earth and asteroid water is complete. The hydrogen inside our planet, the boundary between the mantle and the core of the Earth, has a very different signature, so it is probably not asteroids. In addition, some rare gases appear to be found in the Earth's mantle, typical features of solar dust and gas clouds.
increase in the earth
The researchers therefore propose an extension of the ancient theory that billions of years ago it was possible to fuse several aquifers, from fog to still young sunshine surrounded by asteroids until they reached the end of the century. to the planet Earth. The gases of the solar nebula appeared in its first atmosphere and were captured by its magmatic oceans. The impact of other celestial bodies has brought more water and enlarged the Earth, eventually bringing it back to its present dimensions.
Photo
In addition, according to the model, most of the Earth's water came from asteroids and only a small portion of the gas and dust clouds surrounding the young sun. According to the researchers, about one to two out of 100 water molecules return to the solar nebula.
it should be like the American astronomers have accepted, would have consequences on the probability of exoplanets with water: they may have appeared in the mist of matter to your sun, even if it was in the distant system , no entry of water through the asteroids.
joe / dpa
[ad_2]
Source link
