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Enormous hole in the Universe

Astronomers find billion-light-year void

Toytown Germany > Discussion forum > Themes > Space
GreenTea
Well, I was out cruising around in integalactic cyberspace, as one does, when all of a sudden with no warning, I stumbled upon this:

Enormous Hole in the Universe

QUOTE
Astronomers have found an enormous hole in the Universe, nearly a billion light-years across, empty of both normal matter such as stars, galaxies, and gas, and the mysterious, unseen "dark matter." While earlier studies have shown holes, or voids, in the large-scale structure of the Universe, this new discovery dwarfs them all.

As it says in the article, it has been known for some time that bubbles of totally empty space exist in the universe (note: this is not the same thing as a black hole), but nothing on anything like this scale has been seen before. Just imagine it: you get in your spaceship and fly off to the centre of that void. Nothing but totally empty nothingness for 500 million light years in every direction. If that isn't staggeringly awesome, I don't know what is.

If you want directions on how to get there, or at least see where it is in the sky, check out this guy's web page.
Marshbot
Cool! I wonder what would cause that? And why they didn't expect it... hmmm.

Meanwhile, you might enjoy this too. More of an optical rarity than anything, I guess - but still very cool.
Einstein rings are caused when two galaxies are seen in alignment and one bends the light of the other around it like a lens, so you get a ring. A few days ago Hubble discovered 3 galaxies aligned to make a double ring.

QUOTE
More than just a novelty, a very rare phenomenon found with the Hubble Space Telescope can offer insight into dark matter, dark energy, the nature of distant galaxies, and even the curvature of the Universe.



QUOTE
The massive foreground galaxy is almost perfectly aligned in the sky with two background galaxies at different distances. The foreground galaxy is 3 billion light-years away. The inner ring and outer ring are comprised of multiple images of two galaxies at a distance of 6 billion and approximately 11 billion light-years.


QUOTE
The distribution of dark matter in the foreground galaxies that is warping space to create the gravitational lens can be precisely mapped. In addition, the geometry of the two Einstein rings allowed the team to measure the mass of the middle galaxy precisely to be a value of 1 billion solar masses. The team reports that this is the first measurement of the mass of a dwarf galaxy at cosmological distance (redshift of z=0.6).

More here

Sin
Well I went out last night looking for it and couldn't find it anywhere, sorry. Are you sure there is nothing out there? Because I looked and found nothing.
Janx Spirit
It just goes to prove that we are all figments of each other's imaginations and that verily god does not exist as the picture book daddy with the long beard, an illegitimate son with a whore for a mother and a spectral bosom pal who takes swearing at him very seriously indeed...wink.gif
Sin
Nah Janx Spirit! I didn't see that neither.
Marshbot
Whatever. If you think for a moment God doesn't have a massive invisibility cloak, which would look EXACTLY like this nothing (and all other nothings and non-things) and hence is PROVEN, then you are all wrong/going to hell/etc, etc. (add personalised bible verse here, whatever you interpret to fit best)
Janx Spirit
Shit Marsh, never thought of that.

Anyway, it's Bible you heathen, God shall strike thee down. (After removing His invisibility cloak with a dastardly flourish and a spine chilling cackle)
Yeti
Hope she is wearing fresh undies before she whips that cloak off.
Jimbo
QUOTE (Sin @ Jan 17 2008, 1:40 pm) *
Well I went out last night looking for it and couldn't find it anywhere, sorry. Are you sure there is nothing out there? Because I looked and found nothing.

Birmingham mate. Birmingham.
Sin
Shit! Yeah. It could have been Birmingham. unsure.gif

STOP PRESS! NEWSFLASH! Astronomers find enormous Birmingham in the Universe.
triumph bob
`I refuse to prove that I exist,' says God, `for proof denies faith, and without faith I am nothing.'
`But,' says Man, `The Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own arguments, you don't. QED.'
`Oh dear,' says God, `I hadn't thought of that,' and promptly disappears in a puff of logic.
Marshbot
QUOTE (Janx Spirit @ Jan 17 2008, 2:00 pm) *
Anyway, it's Bible you heathen

bible jible. It's all dirigibles to me.
GreenTea
QUOTE (Marshbot @ Jan 17 2008, 1:04 pm) *
Cool! I wonder what would cause that? And why they didn't expect it... hmmm.

Why they didn't expect it is explained in this link:

QUOTE
the cosmos started out with some areas of slightly higher density than average, and as the universe expanded, gravity sucked more matter into those areas, leaving surrounding regions comparatively empty.

So far, so good. But...

QUOTE
the 14 or so billion years since the Big Bang isn't long enough for gravity to have cleared out a space this huge.

As for what caused it:

QUOTE
the void is so huge that current theory simply can't explain it — and astronomers just love this kind of challenge.

Meanwhile, someone has taken advantage of a Wiki article on the WMAP cold spot to put forward a theory of a parallel universe as a possible explanation.

Who knows, maybe our universe "budded" off from another one, and the void is where the umbilical cord was attached?

Nice to know there's a lot we still don't know.
MajorBummer
A void is still a void. A void isn't nothing. There is no nothing or is there? At any rate, fascinating stuff! Best news I have read in years. You really made my day GreenTea, have been waiting for something like this to be discovered for so long. smile.gif
Sin
So, Professor Ujumaflip, you are credited with discovering nothing. How do you feel?

Empty
Matt T
Well, photons pass through it, so it's not completely empty...

(Sin: just like the M6...)
GreenTea
What would be really cool would be if astronomers were to look at it with the NOT (Nordic Optical Telescope). Great title for a research paper: "NOT Observations of Nothing".
dino_9876
You people (and ofcourse the Scientists) have a looooong way to go...on this one...Scientists might be close to finding God's footprints than you bunch ...
Anyway, keep searching folks...until one day you discover that the TRUTH was always very near to you but you were blind to it all the time!
Go on..keep busy...
As for me, i will blissfully enjoy the radience of the true God and live in peace...
Truth. Punkt!. biggrin.gif
meckle
QUOTE (Matt T @ Feb 4 2008, 1:01 pm) *
Well, photons pass through it, so it's not completely empty...

(Sin: just like the M6...)

How do you reckon that ? Photons don't require any kind of thing to pass thru
GreenTea
@meckle: I suppose what he meant was that the photons themselves are physical entities, so if it contains photons, it isn't empty.
sharpe
what constitutues a physical entity? Photons have zero mass so that may also be discussed if you have nothing to do.
GreenTea
Yes, photons may have zero mass, but they also have a fair bit of energy. E=mc2.
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