New galaxy 'most distant' yet discovered


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Lynn
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Message 1432933 - Posted: 25 Oct 2013, 0:10:26 UTC

Because it takes light so long to travel from the outer edge of the Universe to us, the galaxy appears as it was 13.1 billion years ago (its distance from Earth of 30 billion light-years is because the Universe is expanding).



Impressive!

http://www.bbc.co.uk/news/science-environment-24637890

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Message 1433099 - Posted: 25 Oct 2013, 8:35:35 UTC

Now if we can only work out how to fold space/time and punch through it.

Cheers.

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Message 1433156 - Posted: 25 Oct 2013, 12:23:35 UTC

Or be able to pass through a wormhole...
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Message 1433316 - Posted: 25 Oct 2013, 16:28:51 UTC - in response to Message 1433156.

Or be able to pass through a wormhole...

I like to keep my mind open to these possibilities, as well as open to the idea a Nigerian prince e-mailed me with a monetary opportunity. :) [How's my Ozz imitation? :)]

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Message 1433323 - Posted: 25 Oct 2013, 16:33:35 UTC - in response to Message 1433316.
Last modified: 25 Oct 2013, 17:33:31 UTC

If you, too, are trying to suggest non-sequitur logic is being used in the non-rational thinking, then I think you're doing a great job! ;)

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Message 1433385 - Posted: 25 Oct 2013, 17:27:08 UTC

I liked stargate but they canceled it
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Message 1433394 - Posted: 25 Oct 2013, 17:44:20 UTC - in response to Message 1433323.

If you, too, are trying to suggest non-sequitur logic is being used in the non-rational thinking, then I think you're doing a great job! ;)

Put it this way: we know wormholes are theoretically possible. If we somehow can open one and safely travel one, great. Which opens the doors to all those discussions about aliens, ancient or not. In the meantime, we have not one shred of evidence that wormholes actually exist, let alone that we can open one and travel through one. So, for now, it's wishful thinking. And, for me, I do watch "Ancient Aliens", because it's better than something like "Honey Boo Boo" or "The Voice."

One thing one of their guest had, I think, correct is (for whatever reason): we have amnesia. What happened in the time from being able to speak until we could also write and record thoughts and history?

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Message 1433400 - Posted: 25 Oct 2013, 17:50:39 UTC

we know wormholes are theoretically possible


Stephen Hawking once said that they do exist but on a quantum scale.
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Message 1433401 - Posted: 25 Oct 2013, 17:53:10 UTC

What happened in the time from being able to speak until we could also write and record thoughts and history?

Cave drawings.

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Message 1433581 - Posted: 25 Oct 2013, 20:59:51 UTC - in response to Message 1433394.

If you, too, are trying to suggest non-sequitur logic is being used in the non-rational thinking, then I think you're doing a great job! ;)

Put it this way: we know wormholes are theoretically possible. If we somehow can open one and safely travel one, great. Which opens the doors to all those discussions about aliens, ancient or not. In the meantime, we have not one shred of evidence that wormholes actually exist, let alone that we can open one and travel through one. So, for now, it's wishful thinking. And, for me, I do watch "Ancient Aliens", because it's better than something like "Honey Boo Boo" or "The Voice."

One thing one of their guest had, I think, correct is (for whatever reason): we have amnesia. What happened in the time from being able to speak until we could also write and record thoughts and history?


from what little I've read on wormholes, they'd be infinitely small. So you'd have to have technology to breakdown a person to fit into one then rebuild them as they left it. Much like the transporters in Star Trek
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Message 1433618 - Posted: 25 Oct 2013, 21:39:19 UTC - in response to Message 1433401.

What happened in the time from being able to speak until we could also write and record thoughts and history?

Cave drawings.


Hard to swallow.
Speaking.
Tens of thousands of years making cave drawings.
Then ... BAM!!!
Monoliths & megaliths?
Nothing between?

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Message 1433822 - Posted: 26 Oct 2013, 1:22:49 UTC - in response to Message 1432933.

Because it takes light so long to travel from the outer edge of the Universe to us, the galaxy appears as it was 13.1 billion years ago (its distance from Earth of 30 billion light-years is because the Universe is expanding).

As a non-astrophysicist this is one of the things that nags at me...at what time was/is it 13.1 or 30 billion LY away?

At the big bang everything was at the same point in space? I think? So...an instant thereafter the location in space where this galaxy is now was not 30 billion LY away from our location, it was one angstrom away from "us".

Then...due to inflation, things expanded much faster than the speed of light and that location moved, I don't know, light years away in less than a second. Then stuff happened, the universe became transparent, this other galaxy formed and emitted some light but *at that time* it was not 13.1 GLY away, right? I think?

But due to the expansion of space itself the light emitted traveled toward us at *less* than the speed of light so it took 13.1 billion years to get here. So when it emitted the light we just observed it was less than 13.1 billion LY away and now it is more than that away, in fact it has traveled away at superluminal relative speeds due to the expansion of space and now is forever invisible to us because it's over the "horizon".

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Message 1433903 - Posted: 26 Oct 2013, 7:04:10 UTC

"horizon".


And that would be the cosmic microwave background radiation then?
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Message 1433990 - Posted: 26 Oct 2013, 14:09:20 UTC - in response to Message 1433903.

"horizon".


And that would be the cosmic microwave background radiation then?

As in some of the light emitted during the period of cosmic faster-than-light inflation is only now catching up with where we are now...


Strange pan-dimensional stuff...

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Message 1433994 - Posted: 26 Oct 2013, 14:10:53 UTC - in response to Message 1433903.

And that would be the cosmic microwave background radiation then?

Not exactly. Have you ever noticed that the Hubble constant is just one number? There's no relativistic properties attached to it? That's something that's never emphasized when you learn about it, there is nothing stopping space from moving away from us at greater than the speed of light, just multiply H by a big enough distance and you get it.

So what i mean by "over the horizon" is that something has moved far enough away from us that it is traveling away (or more correctly, space between it and us is expanding) at more than c. So it's light can no longer ever reach us. It's in part of the universe that is lost to observation. We have no idea if that part of the universe is small, big, or infinite.

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Message 1434715 - Posted: 28 Oct 2013, 12:33:30 UTC

there is nothing stopping space from moving away from us at greater than the speed of light


That's where dark energy comes in but that's only a hypothetical form of energy...
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Message 1434798 - Posted: 28 Oct 2013, 16:54:30 UTC - in response to Message 1434715.
Last modified: 28 Oct 2013, 16:56:35 UTC

That's where dark energy comes in but that's only a hypothetical form of energy...


If in fact the expansion is increasing in speed then the "Dark Energy" would be akin to a negative gravity.

Don't forget that when we say that far away galaxies are moving at faster and faster speeds we are looking at conditions perhaps 13 billion years ago. (Red shift greater than 7). Back then I expect that gravity had not yet had enough time to catch up to the pressure of the big bang and so you would expect high expansion rates. Can anyone reconcile this idea with what we say is happening now ala dark energy.

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Message 1434806 - Posted: 28 Oct 2013, 17:12:14 UTC

Found quite an interesting article.

http://www.physicsoftheuniverse.com/topics_bigbang_accelerating.html
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Message 1435077 - Posted: 29 Oct 2013, 5:26:57 UTC - in response to Message 1434806.

Found quite an interesting article.

http://www.physicsoftheuniverse.com/topics_bigbang_accelerating.html



Thanks for the read, Julie.


The universe wastes nothing, it's simply transferred.

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Message 1435126 - Posted: 29 Oct 2013, 11:29:58 UTC

You're welcome Lynn :)
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