One simple explanation is density. Given same size the more dense
planets are more outwards. The problem are the gas planets, but e.g.
Jupiter is way more massive what explains its position. Further upon
formation most planetary system are dual star systems and certainly
there is a complex evolution process until are orbits reach so called
resonant stages.
For people that want to learn by doing: Just load a centrifuge with
different material an look what happens!
J.W.
On 08.01.2021 14:55, ROGER ANDERTON wrote:
>>1) If both the Sun and the planets formed from the same gas/dust
cloud, how come the Sun is mostly Hydrogen and the
Earth is a rocky planet?<<
one theory/hypothesis/speculation is that there were supermassive
stars (that have lived out their lives and died) in early universe
where the heavier elements than hydrogen were manifactured and the
remants of that were what formed rocky planets. While planets like
Jupiter are just failed stars that weren't quite massive enough to
start nuclear fusion
>>2) If some selection process caused primarily Hydrogen to condense
at the middle, why are the rocky planets closer to
the Sun than the gas giants?<<
happenstance. Dragoslav explains planet density and their distances by
update of Bode's law to Boscovich theory of repulsive and attractive
forces for solar system
https://www.researchgate.net/publication/281489710_ROGER_BOSCOVICH_-_THE_FOUNDER_OF_MODERN_SCIENCE
------ Original Message ------ From: "Robin"
<[email protected]> To: "VORTEX"
<[email protected]> Sent: Friday, 8 Jan, 21 At 04:51 Subject:
[Vo]:planetary formation Hi, Questions: 1) If both the Sun and the
planets formed from the same gas/dust cloud, how come the Sun is
mostly Hydrogen and the Earth is a rocky planet? 2) If some
selection process caused primarily Hydrogen to condense at the
middle, why are the rocky planets closer to the Sun than the gas
giants? Regards, R. van Spaandonk Crops, not towns, should be
planted on floodplains. Even the ancient Egyptians knew this.
--
Jürg Wyttenbach
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