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Astronomers Discover The Most Massive Supercluster Ever Found

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#1 DanMiller

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Posted 24 March 2024 - 09:01 AM

ScienceAlert.com

This a really interesting read.

 

The Milky Way is part of a large structure called the Laniakea Supercluster which is 250 million light years across!

 

Chuckle, remember this sentence.

When I give public lectures, I always get a strange satisfaction out of telling the audience that galaxies don't exist!
go on to explain that, like a city which is a collection of stuff, galaxies are collections of things bound together under the force of gravity. A typical galaxy is simply a collection of stars, nebulae, clusters, planets, comets and so on, take them away and a galaxy won't exist!
Superclusters are largely the same, just a collection of galaxies bound together (well, not completely) under the force of gravity.
Superclusters like Laniakea and Einasto (which is 3 billion light years away) are among the largest structures in the Universe.

When we talk about clusters here on CN, we usualy are talking about a star cluster where I don't really remember seeing any galaxies.  But in the defination provided above, a galaxy really is a cluster.  It has groups of things.  Which is all that a cluster really is.  So, it is just one big old cluster.

 

 

Dan



#2 rob1986

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Posted 24 March 2024 - 09:35 AM

A star is just a dense cluster of protons....
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#3 Jsg

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Posted 24 March 2024 - 04:35 PM

A proton is just an unclear number of strings...

(Which randomly appear and disappear with a meow)

Edited by Jsg, 24 March 2024 - 05:21 PM.


#4 Jsg

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Posted 24 March 2024 - 05:04 PM

It is an interesting read, but I have to say that I'm not tremendously WOWed by this. 😲!!

A "structure" 250mly across has a diameter about 1% of the diameter of the visible universe from where we sit. (13bly x 2 = 26 bly, ÷ 250mly = 100)

So, if the visible universe were a beach ball 1 meter dia., the structure would be the size of a marble. You can get a lot of marbles into a one meter sphere.

And that's just the visible universe.

The universe is not uniform in distribution of what constitutes it. Are these "structures" really that at all, or just random concentrations of matter and energy, somewhat denser than the surrounding areas? (And not so dense any way you look at it)

250mly dia. is indeed a huge area. But I can see beyond that with a 12" Dobson in my front yard. (Barely...)

What fascinates me, or disturbs me, is the vast emptiness between these areas of slight density.

What's REALLY big is what's beyond the visible universe, beyond what Webb can see, beyond what we can imagine. IMNSHO (in my not so humble opinion)

The universe is probably a lot larger than we think it is.

🪐

Edited by Jsg, 24 March 2024 - 05:36 PM.

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#5 DanMiller

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Posted 24 March 2024 - 05:30 PM

It is an interesting read, but I have to say that I'm not tremendously WOWed by this. !!

A "structure" 250mly across has a diameter about 1% of the diameter of the visible universe from where we sit. (13bly x 2 = 26 bly, ÷ 250mly = 100)

So, if the visible universe were a beach ball 1 meter dia., the structure would be the size of a marble. You can get a lot of marbles into a one meter sphere.

And that's just the visible universe.

The universe is not uniform in distribution of what constitutes it. Are these "structures" really that at all, or just random concentrations of matter and energy, somewhat denser than the surrounding areas? (And not so dense any way you look at it)

250mly dia. is indeed a huge area. But I can see beyond that with a 12" Dobson in my front yard. (Barely...)

What fascinates me, or disturbs me, is the vast emptiness between these areas of slight density.

What's REALLY big is what's beyond the visible universe, beyond what Webb can see, beyond what we can imagine. IMNSHO (in my not so humble opinion)

The only reason I posted it, I think anyway.  Was the sentence about Galaxies don't exist. That they are nothing but a cluster.   And after thinking about it.  It really is nothing but a cluster of stars and what clusters around those stars.  Just made me sit back and think.

 

Dan



#6 Jsg

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Posted 24 March 2024 - 05:40 PM

Yes it does Dan and thanks for posting.

Are we just clusters of amino acids and water? When is the whole greater than the sum of the parts? What constitutes our sentience?

Is some sort of sentience contained in between the clusters of galaxies? Sub-space intelligence across intergalactic space?

As the bacteria on your skin have no awareness of your awareness, so we would have no ability to perceive the sentience of galactic structures.

Edited by Jsg, 24 March 2024 - 05:46 PM.

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