Astronomy / Space Milky Way is on the outskirts of 'immeasurable heaven' supercluster

Codec

Codec
I am an astronomer, and while interesting its not that big a story.
We know we are in a TINY cluster, M33 and andromeda - and we'll merge eventually ~5-10 billion years or so.
We're part of a bigger cluster, the virgo cluster.
The center of the local supercluster is where the biggest concentration of mass is, and so it sucks in all nearby objects. You end up with galaxy clusters of up to a few thousand galaxies all circulating around each other, like starts in the milky way.

Then there are filaments between these clusters, like long pieces of elastic, and we're sitting on one of those. Eventually we'll probably be pulled in, and this will make a mess of our galaxy. The nice spiral shape will be replaced by a jumbled up elliptical galaxy, and it won't be the same anymore!

Incidentally, the author Tully is a famous astronomer, who has his own term, the Tully-Fisher relationship!
 

SuperG

S
I wonder if everything in this super cluster is gravitational bound and moving to this central point. Something very very heavy must be at the core. A few close or one monsterious extreem super massive blackhole in a core galaxy. Or extreemly croweded zone with so high density of galaxy's that it gravitational influence is so huge and very far.

I wonder.
 

Codec

Codec
It's a dark matter halo that is responsible mostly for the gravitational well into which everything is attracted.

Super massive black holes weigh up to around 100,000,000 (10^8) solar masses, whilst a galaxy itself might weigh 10^11 Msolar - so 1000 times more than the BH. The dark matter halo in which a cluster sits might weigh 10^15 Msolar, so another 10000 times more massive than the individual galaxies.

We're probably only weakly bound to the supercluster, but will probably get sucked into it eventually. Over a time scale of about 10-100 billion years or so :)
 

Codec

Codec
Oh, its around about 2000000000000000000000000000000000000000000000 bags of sugar

Wait... I haven't even started to talk about Gigaparsecs and gigayears...

:) :)
 

Patrick_68000

Patrick_68000
I had seen the article on a French site. They also say that there may be 6 millions of superclusters in the known universe. We are truly microscopic
 
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Patrick_68000

Patrick_68000
Laniakea contains 100000 large galaxies (100 billions of stars each) but also 1 million dwarf galaxies (1 to 10 billions of stars each)
 

SuperG

S
Codec said:
It's a dark matter halo that is responsible mostly for the gravitational well into which everything is attracted.

Super massive black holes weigh up to around 100,000,000 (10^8) solar masses, whilst a galaxy itself might weigh 10^11 Msolar - so 1000 times more than the BH. The dark matter halo in which a cluster sits might weigh 10^15 Msolar, so another 10000 times more massive than the individual galaxies.

We're probably only weakly bound to the supercluster, but will probably get sucked into it eventually. Over a time scale of about 10-100 billion years or so :)
Click to expand...

Everything is moving to the great attractor. If it is also the dark matter then this dark matter need to be also as a massive dark matter point.

I think dark matter and matter do there part but not exclusive. So bunch very concentrated very heavy galaxis and the dark matter to assist. Make everything flocking to the great atractor.
 

Codec

Codec
SuperG said:
Everything is moving to the great attractor.
Click to expand...
Nope - a few things are moving towards it, if it is indeed real and not a measurement anomaly.

I think dark matter and matter do there part but not exclusive. So bunch very concentrated very heavy galaxis and the dark matter to assist. Make everything flocking to the great atractor.
Click to expand...

Dark matter is not exclusive, but it is about 80% of the effects. The rest is regular matter, except on very very large scales where dark energy comes into play.
The dark attractor, as I said, is quite localised.
 
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