Please enable JavaScript.
Coggle requires JavaScript to display documents.
Thoughts on the Nebular Theory of our Planetary System Formation,…
Thoughts on the Nebular Theory of our
Planetary System Formation
The Nebular Hypothesis
Invented by Emanuel Swedenborg (1734).
Immanuel Kant extended the theory (1755).
A similar model was proposed by
Pierre-Simon Laplace (1796).
If nebulae and gas clouds rotate slowly, they
would slowly contract and flatten under their own gravitational force, and eventually the central star and planets of the solar system would be formed.
The Solar System begins as a large, approximately spherical cloud of very cold interstellar gas.
Such a cloud is just heavy enough for its
own gravitational contraction.
Hypothesis of a Solar Nebula.
Also known as the KantLaplace hypothesis.
The most accepted explanation for the origin of the Solar System.
Criticism of the planetary nebular theory
The planets are situated at very large distances from eachother.
There is no reason at all to get small and iron-rich planets
close to the Sun and large rocky gas-planets far from the Sun.
Jupiter has its Trojan asteroids at fixed distances on its orbit.
The gravitational compression inside the planets alone could heat up their core up to the known temperatures.
Matter would migrate from one
orbit to another
The accretion disk cannot become hot like the Earth’s interior, just by kinetic, potential or gravitational action from the Sun.
Larger clumped objects would
orbit in a circular way and, at the same time, that smaller
clumped objects would orbit along an elliptic path.
The accretion disk is radially symmetrical.
No foundation of the split into a group
of core planets close to the star and a group of gas planets
far from the star.
Even if close to the Sun, the vortices would create friction,
collisions and heat
The "sweep up" of planetesimals
by gravity doesn’t make any sense,
A disk of dust doesn’t become turbulent
just like that.
The Sun is known to be highly magnetic.
The sunspots, mainly made of iron and metals, concentrate the magnetic lines by
their high magnetic permeability.
Between two sunspots, magnetic lines are linked through space.
Alternate theory
