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Earth is thanks to Supernova, no ocean planet

the earth Would have collected at the time of their emergence is too much water, it would become an inhospitable ocean in the world. A new Simulation shows that the radioactive elements from a nearby Supernova dried, the "components" of the earth, before they curled together.

A deep global ocean, and an impenetrable layer of ice on the sea floor. So the earth would have been able to appearance quite, you would have accumulated in their formation, a higher water content. This would have prevented geochemical cycles like the carbon cycle, stabilizing the climate and conditions for life.

A research team at the ETH Zurich and the universities of Bern, Oxford, Bayreuth, and Michigan has been simulated with computer models, how it came to life-friendly, water content of the soil, such as the National research focus PlanetS announced on Tuesday.

too Much water

Thus, a dying star (Supernova) was in the cosmic neighborhood for dryer building blocks from which the inner planets of our solar system formed. Of the scientists, Tim Lichtenberg in the journal "Nature, Astronomy Letters reports".

These blocks, chunks of Rock and ice, formed in a dust and gas disk around the young sun. After this so-called plan grew tesimale then to the planet embryo. "It is currently assumed that the earth is the largest part of their water from this part of the water plan has tesimalen inherited", was Lichtenberg in the message quote. Theoretically, the earth would have added so much to a lot of water.

"Internal heating"

With their Simulation, the researchers are now testing the theory that the plan tesimale from the inside were heated, so that a part of the original water evaporated ice. This "inner heating" was based on the decay of radioactive elements like aluminum-26, which came from the nearby Supernova. The computer models showed that the amount of aluminum-26, which was at the birth of our planetary system, is sufficient to dry plan tesimale systematically, before they grow up to planetary embryos.

The radioactive aluminum could make the difference whether a planet system planets with relatively little water, such as in our solar system, or whether, in the first line of the ocean, the worlds arise, said Lichtenberg.

(oli/sda)

Created: 17.02.2019, 10:38 PM

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