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
>Sun And solar system start like a cloud of dust Wich comes from old supernova.
That’s not entirely true. While there are some heavy particles from supernova, over 99% of the cloud was a mix of hydrogen & helium from the beginning of the universe.
For reference: in astronomy, metals are anything heavier than helium.
The reason there isn’t a high cencentration of metals throughout the solar system is because there’s not a lot of metals to begin with.
The sun alone is 99.8% of the total mass of the system. Jupiter alone is another 0.1%. Around 0.1% of the sun is metals, meaning that there are more metals in the sun than all the terrestrial planets, dwarf planets, asteroids, and comets combined.
The real question is why there isn’t a lot of hydrogen and helium in the inner solar system. The answer is probably a combination of the planets being too small and the solar winds being too strong for the planets to hold on to it.
The outer gas giants all have cores (potentially of metals) more massive than Earth and are further away from the sun, so the solar winds are weaker. So, the giants have an easier time holding onto their hydrogen and helium.
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