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 heavier elements are much much less abundant than hydrogen and helium, so analogously the crystallization point race where dust accumulates into planets would be won by the abundance of material.
But actually the sun accumulated that first hence why its 99% of the mass of the solar system and generally purely hydrogen and helium, and once the sun hits a certain temperature for fusion it inflates a stellar windstream envelope which pushes the dust away from planetary accretion disks, which should have fully formed multiple planets by that point which will stop growing from loose dust and instead rely on impacts with other bodies.
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