Sun And solar system start like a cloud of dust Wich comes from old supernova. IT should build on Gravity of heavier stuff like iron, gold, lead, uran,Mercury etc. In the center. Like our planet have high concentration of heavy elements, mostly iron. Should not be the same case with every other planet even more with stars? Instead i read of metal hydrogen in core of Jupiter And fusion of hydrogen in Sun. Should not they be full of heavy stuff And the light stuff float out?
In: Planetary Science
The cloud of gas that formed the solar system is mostly hydrogen and helium with other elements accounting for less than 2% of its mass. This is reflected by the compositions of both the sun and of Jupiter. When the solar system formed, however, the heat and solar wind from the young sun drove most of the hydrogen and helium out of the inner solar system, leaving behind mostly rock and metal.
When the sun (containing 99.8% of the solar system’s mass) formed, the compression heated its interior to millions of degrees. Everything is plasma at those temperatures so all the other elements just stayed mixed in a plasma that was already mostly hydrogen and helium.
Jupiter is thought to have a core composed at least partly of rock and metal, but it appears that it is still mixed in with the metallic hydrogen. Jupiter’s core is not as hot as the sun’s, but it is still much hotter than Earth’s.
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