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The computing power has moved on as well, but my graphics card can't work at the resolutions that do it justice,

Have a go


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Channel Hopper wrote:
ZapAxe wrote:I believe there are more simularities throughout the uninerse & between other galaxies, down to smaller scale.



Oh yes !




Amazing!!

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Channel Hopper wrote:The computing power has moved on as well, but my graphics card can't work at the resolutions that do it justice,

Have a go




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smeggypants wrote:I think the similarity is down to gravity and obriting around a cenre ( solar system is a similar structure ).


Bingo.

What gets the objects spinning though I dunno.


Conservation of angular momentum.



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So are the bits without stars and planets dark matter?

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No. Dark matter exists mostly - or at least dominates in - the haloes of galaxies. Dark matter was postulated specifically to account for observations that don't fit with our understanding of how gravity works. Specifically, the stars in the 'suburbs' of rotating galaxies are moving in their orbits around the galactic centre so fast that they should be escaping. That they aren't escaping means that there must be more matter than we can see.

People talk about dark matter as if it's some sort of exotic stuff, but this isn't clear at all. What it is is simply matter that doesn't emit or reflect electromagnetic radiation in any part of the spectrum we can detect. We know it's there, but we don't know what it is.



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Should show up using different lenses?

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hackenslash wrote:
smeggypants wrote:I think the similarity is down to gravity and obriting around a centre ( solar system is a similar structure ).


Bingo.

What gets the objects spinning though I dunno.


Conservation of angular momentum.


That's what keeps them spinning. :)


If there's a bunch of masses in space then obviously gravity will tend to pull them together. Why wouldn't they mostly just collapse on each other linearly rather than mostly go into orbit and sloaly spirally collapse into the central black hole ( like the Milky way )

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Same reason. Think of a cloud of gas, with particles moving at different speeds. As it starts to clump, it swirls, due to particles and groups of particles moving past each other at different velocities. As the star forms, then, there is rotation imparted to the system.



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hackenslash wrote:Same reason. Think of a cloud of gas, with particles moving at different speeds. As it starts to clump, it swirls, due to particles and groups of particles moving past each other at different velocities. As the star forms, then, there is rotation imparted to the system.


Not if those particles are relatively stationary to each other.

I would agree that in many cases the particles are already in motion before the critical mass is reached to form a Sun, and ( if any ) orbital planets, or suns to form a black hole centred orbital galaxy, but surely there's no 100% guarantee of that?

Mind you I guess in the cases where the gravity takes control in the stationary clump, the matter will simply simply hurtle towards the centre pretty quickly, thus leaving no time to form an orbital structure. Lonely Black holes waiting patiently for the next hapless lump of matter to stumble across them :)

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smeggypants wrote: Lonely Black holes waiting patiently for the next hapless lump of matter to stumble across them :)



It is a very efficient way of grabbing energy, very little output required, which is why many deep sea creatures use this method for feeding.

The vast majority of black holes don't just wait about for their lunch either, they are already in motion from the kinetic forces that created them, and thanks to previous conquests, they will have a velocity that pften exceeds those of their victims.

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