Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar System Formation Deduced from Observations of Matter   Aspects of our Solar System's formation are deduced from observations of the
chemical nature of matter. Massive cores are indicative of
terrestrial-planet-composition-similarity to enstatite chondrite meteorites,
whose highly-reduced state of oxidation may be thermodynamically stable in
solar matter only at elevated temperatures and pressures. Consistent with the
formation of Earth as envisioned by Arnold Eucken, thermodynamic considerations
lead to the deduction that the terrestrial planets formed by
liquid-condensation, raining out from the central regions of hot, gaseous
protoplanets. The mass of protoplanetary-Earth, estimated to be 275-305mE, is
similar to the mass of Jupiter, 318mE. Solar primordial gases and volatile
elements were separated from the terrestrial planets early after planet
formation, presumably during some super-luminous solar event, perhaps even
before Mercury had completely formed. The
pre-super-luminosity-terrestrial-planet mass distribution appears to be more
consistent with observations of the close-in gas-giants of other planetary
systems than the present-day-terrestrial-planet mass distribution. Although
primarily formed by raining out from the centers of hot, gaseous protoplanets,
evidence for the Earth and, by inference for the other terrestrial planets,
suggests some outer, minor, secondary accretion of oxidized matter in the
grain-growth accumulation way envisioned by George W. Wetherill. By contrast,
the so-called "standard model" for our Solar System's formation has flawed
conceptual underpinnings and would lead to the contradiction of terrestrial
planets having insufficiently massive cores.

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The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph