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jimness

Scale of the Universe

20 posts in this topic

Very interesting.. thanks!

First time I ever heard of preons though... the building blocks of quarks? :eek:

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For some reason I can only picture the universe as a an ovoid of about 65x35cms.

Never has been any bigger then that to me. And yes it is all contained in there.

Main concern is: Why ovoid and not spherical?

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Thankyou very much. Love the bit with the stars, they just get bigger and bigger. Makes you realise how small the sun is. Its also interesting looking at those stars in the night sky and knowing there relative size.

Can you see the biggest galaxy from earth with a telescope?

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i used to work on nanomolecular structures, so 10^-9m and am now looking at things that are 10^18m big, thats a 10^27 or 1000000000000000000000000000x larger scale :eek:

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Can you see the biggest galaxy from earth with a telescope?

Well it seems accepted that the biggest known galaxy is IC 1101, whch you can indeed see from earth with a telescope. Though judging by its picture on Wikipedia (IC 1101 - Wikipedia, the free encyclopedia), it looks like a tough object to see or photograph, even though the damn thing is over 5 million light years across! Crumbs etc.

Of course it's almost certain that that's NOT the largest galaxy in the Universe - just the biggest one we've spotted so far - and it may well be that the biggest one is outside the observable Universe so we'll never know about it.

Jim

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Great, thanks for sharing.

I just hope I don't dig up a giant earthworm !!!

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Great, thanks for sharing.

I just hope I don't dig up a giant earthworm !!!

7 meters long:eek:. OMG. I wonder if its as thick as it shows in the animation.

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Nice one - thanks!

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You had to post this again, didn't you? Now i have to spend half an hour on it, the day before an exam too :eek:

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An absolute delight! great fun to get an idea of the scale of things. The one that always gets me is the emptiness within an atom. However, there were one or two things i feel i need to point out...

Pedant mode activated!

Preons are entirely hypothetical, and in fact there are good theoretical and observational reasons to believe they do not exist, he probably should have mentioned that.

The observable universe is larger than 14 billion light years! although it seems against common sense that we could be seeing things that are farther away than the speed of light times the age of the universe, we in fact can, due to the expansion of the intervening space. The actual figure is about 45 billion light years in any direction.

As for the actual size of the universe... i don't think anyone has any idea. i'm not so sure about it being infinite, but i'd hardly be surprised if it turned out that our observable universe was but an atom to the entire thing...

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thanks for the post jim

superb music as well........u know what it is ?

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toml42

As for the actual size of the universe... i don't think anyone has any idea. i'm not so sure about it being infinite, but i'd hardly be surprised if it turned out that our observable universe was but an atom to the entire thing...

i can relate to that

we are clever, but not that clever, i just wonder where we stand on the 'clever' scale of all intellegent life that is out there..........probably sharing a spot with the amoeba

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thanks for the post jim

superb music as well........u know what it is ?

A coupla clicks tells me it's by Kevin MacLeod, who can be found at Incompetech.

Jim

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wow mind boggling

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As for the actual size of the universe... i don't think anyone has any idea. i'm not so sure about it being infinite, but i'd hardly be surprised if it turned out that our observable universe was but an atom to the entire thing...

Ha, there's the basis for a theory thought up while under the influence of narcotics :)

"Dude... what if we're just the result of someone striking a match in a much bigger universe than our own?"

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brilliant

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That should be shown in scool for children at an earliest possible age where they can be taught what are quarks, electrons, dimensions and galaxies. That's brilliant.

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