Accretion

Historic planetary instability and catastrophe. Evidence for electrical scarring on planets and moons. Electrical events in today's solar system. Electric Earth.

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Accretion

Unread postby Roshi » Mon Aug 28, 2017 1:46 am

Stars form by the gravitational collapse of interstellar gas. Prior to collapse, this gas is mostly in the form of molecular clouds, such as the Orion Nebula. As the cloud collapses, losing potential energy, it heats up, gaining kinetic energy, and the conservation of angular momentum ensures that the cloud forms a flatted diskā€”the accretion disk.


The initial collapse of a solar-mass protostellar nebula takes around 100,000 years.[6][7] Every nebula begins with a certain amount of angular momentum. Gas in the central part of the nebula, with relatively low angular momentum, undergoes fast compression and forms a hot hydrostatic (non-contracting) core containing a small fraction of the mass of the original nebula. This core forms the seed of what will become a star.[6] As the collapse continues, conservation of angular momentum dictates that the rotation of the infalling envelope accelerates, which eventually forms a disk.

https://en.wikipedia.org/wiki/Accretion_(astrophysics)

What about "gas pressure"? Not one word. There isn't any when you don't need it for your theory. Gas "undergoes fast compression" and the "collapse" simply "continues". No pressure. Maybe gases experience pressure only when they are on Earth... If we believe Wikipedia, the atmosphere should simply collapse on us, and form a liquid, then a star... I don't know why that does not happen, it's a mistery.

And a question: shouldn't that dust or gas in the accretion disk - accumulate a static charge through friction?
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Re: Accretion

Unread postby Maol » Mon Aug 28, 2017 2:10 am

Galactic dust bunnies.
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Re: Accretion

Unread postby Roshi » Mon Aug 28, 2017 6:16 am

How does a planet's liquid core form? Let's skip the part about "gas" that forms stars then the stars form pieces of rock and dust and iron (needed to form planets) when they explode. If we have billions of pieces of rock, in close proximity to one another, is gravity enough to squeeze them together and melt them? Melt most of them in fact, the Earth is mostly melted material, the crust is very thin relatively:

https://en.wikipedia.org/wiki/Lithosphere

Also, how does accretion deal with the fact that gravity does not attract stuff towards a center point, but towards the place with the most mass. That's why in theory if there was a hole through the Earth, in the middle we would be weightless.
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Re: Accretion

Unread postby Maol » Mon Aug 28, 2017 12:02 pm

You would, however, still be very dense.
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