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The Solar System was formed in two stages

2021-01-22T17:25:28.638Z


The Solar System was formed in two stages: it is the hypothesis suggested by new data and a simulation, capable of explaining the diversity between the innermost rocky planets, Mercury, Venus, Earth, Mars and the gaseous ones, such as Jupiter (ANSA)


The Solar System was formed in two stages: it is the hypothesis suggested by new data and a simulation, capable of explaining the diversity between the innermost rocky planets, Mercury, Venus, Earth, Mars and the gaseous ones, such as Jupiter.

The result, published in the journal Science, is due to researchers coordinated by Tim Lichtenberg, of the British University of Oxford.

"The inner Solar System, which formed earlier and is drier, and the outer Solar System, which formed later and is wetter, are different due to two different evolutionary pathways," Lichtenberg noted.

This, he added, "opens up new avenues for understanding the origins of the atmospheres of Earth-like planets."

Recent observations on the disks of dust and gases that form around newborn stars have shown that in the region of the disk where planets are born there can be levels of turbulence such that interactions between the dust grains in the disk and the water can trigger two different explosions of planets brick formation.

The first occurs in the innermost regions of the planetary system and the second occurs later in a more distant region.

The two distinct episodes of formation determine different geophysical modes of evolution: in the inner region and closest to the star, the bricks of the planets undergo rapid dehydration, while in the outer region they remain more humid.

To prove this, the researchers developed a simulation of the formation of the Solar System, showing that indeed the difference between the inner rocky planets and the outer gaseous ones can be explained if these planets were born in two different phases.

"The young planets of the Inner Solar System - observed Lichtenberg - became very hot, developed oceans of inner magma, quickly formed iron cores and their initial content of volatile elements evaporated, leading them to become dry planets".

Source: ansa

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