Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Dark energy and flat Universe exposed by simple method
BBC News ^ | 11/24/10 | BBC

Posted on 11/24/2010 12:52:49 PM PST by NormsRevenge

Researchers have developed a simple technique that adds evidence to the theory that the Universe is flat.

Moreover, the method - developed by revisiting a 30-year-old idea - confirms that "dark energy" makes up nearly three-quarters of the Universe.

The research, published in Nature, uses existing data and relies on fewer assumptions than current approaches.

Author Christian Marinoni says the idea turns estimating the Universe's shape into "primary school" geometry.

While the idea of the Earth being flat preoccupied explorers centuries ago, the question of whether the Universe itself is flat remains a debatable topic.

The degree to which the Universe is curved has an effect on what astronomers see when they look into the cosmos.

A telescope on or near Earth may see an image of a celestial object differently from how the object actually looks, because the very fabric of space and time bends the light coming from it.

Christian Marinoni and Adeline Buzzi of the University of Provence have made use of this phenomenon in their technique.

...

Circular reasoning

The technique used in this study was first proposed in 1979 by researchers at the universities of Princeton and Berkeley in the US.

It relies on measuring the degree to which images of far-flung astronomical objects are a distortion of their real appearance. The authors originally suggested a spherical object would work.

(Excerpt) Read more at bbc.co.uk ...


TOPICS: News/Current Events; Your Opinion/Questions
KEYWORDS: darkenergy; darkforce; darkmatter; exposed; flatuniverse; simplemethod; speedofdark; stringtheory
Hold muh beer, Vern. I'm gonna take a measurement.
1 posted on 11/24/2010 12:52:52 PM PST by NormsRevenge
[ Post Reply | Private Reply | View Replies]

“Once you measure the abundance of matter and energy in the Universe, you have direct information on its geometry; you can do geometry as we learn in primary school”

Christian Marinoni
University of Provence


2 posted on 11/24/2010 12:54:22 PM PST by NormsRevenge (Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
... I guess "flat" needs to be explored in more detail.

I propose to start my investigation in Kansas.


3 posted on 11/24/2010 12:55:48 PM PST by r9etb
[ Post Reply | Private Reply | To 1 | View Replies]

Sloan Digital Sky Survey
http://www.sdss.org/


4 posted on 11/24/2010 12:55:48 PM PST by NormsRevenge (Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)
[ Post Reply | Private Reply | To 2 | View Replies]

The 2.5-meter telescope at Apache Point Observatory, named the Sloan Foundation Telescope in recognition of the pivotal and generous support of the Alfred P. Sloan Foundation through all phases of the SDSS. All SDSS imaging and spectroscopy were carried out with the Sloan Telescope, equipped with a large format digital camera and fiber-fed spectrographs that measured spectra of 640 objects at a time. These facilities, together with some new instruments, are also being used for SDSS-III. You can see the Sloan Telescope in action in this vid eo from the American Museum of Natural History. Credit: The Sloan Digital Sky Survey.


5 posted on 11/24/2010 12:57:10 PM PST by NormsRevenge (Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)
[ Post Reply | Private Reply | To 4 | View Replies]

To: NormsRevenge

Isaiah 40:22 “[It is] he that sitteth upon the circle of the earth, and the inhabitants thereof [are] as grasshoppers; that stretcheth out the heavens as a curtain, and spreadeth them out as a tent to dwell in:”

Psalm 104:2 “Who coverest [thyself] with light as [with] a garment: who stretchest out the heavens like a curtain:”


6 posted on 11/24/2010 12:58:59 PM PST by prolusion
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge


A Buzzi
7 posted on 11/24/2010 1:01:30 PM PST by eCSMaster
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
Alan Heavens, a theoretical astrophysicist at the University of Edinburgh, said that the strength of the result lies in that it requires few assumptions about the nature of the cosmos.

I guess he should know.

Still an article about a whole lot of nothing. The pick two different assumptions than others hold and get the same results. Still, garbage in, garbage out.

8 posted on 11/24/2010 1:06:31 PM PST by PhilosopherStone1000
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

If dark matter really existed, we would have a prediction of its existence based on the laws of physics. Since there is no theory of dark matter, why pretend it exists?


9 posted on 11/24/2010 1:11:08 PM PST by Fractal Trader
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

If the universe is flat, does it sit on the back of a turtle?


10 posted on 11/24/2010 1:23:42 PM PST by Cicero (Marcus Tullius.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: r9etb

The Kansas State team was sure flat last night.


11 posted on 11/24/2010 1:26:01 PM PST by SeeSac
[ Post Reply | Private Reply | To 3 | View Replies]

To: NormsRevenge

Now we know where she came from............or went to.................

12 posted on 11/24/2010 1:28:02 PM PST by Red Badger (The House finally fell on Nancy Pelosi..........)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
the very fabric of space and time bends the light coming from it.

What type of fabric is space and time made of? Is it washable, or should it be dry cleaned?

13 posted on 11/24/2010 1:29:33 PM PST by GreenHornet
[ Post Reply | Private Reply | To 1 | View Replies]

To: Fractal Trader
If dark matter really existed, we would have a prediction of its existence based on the laws of physics.

The laws of physics are our mathematical guesses at how the universe works. They are not fixed since we do not know exactly how the universe works.

14 posted on 11/24/2010 1:31:19 PM PST by SeeSac
[ Post Reply | Private Reply | To 9 | View Replies]

To: NormsRevenge

They still don’t know, do they?


15 posted on 11/24/2010 1:36:35 PM PST by Leftism is Mentally Deranged (Annoying liberals is my goal. I will not be silenced.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge

My, my.


16 posted on 11/24/2010 1:38:37 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SeeSac

Though it´s a little like Fermi´s famous question with regard to ETs: ¨Where are they?¨

Why can´t we sample this ¨dark energy¨ directly as it´s supposed to be everywhere?


17 posted on 11/24/2010 1:44:07 PM PST by onedoug
[ Post Reply | Private Reply | To 14 | View Replies]

To: NormsRevenge; All

(Thanks for posting this article ,btw. Great topics)

What does DARK ANTI-MATTER look like? Can we see it, and if not, why the heck not?


18 posted on 11/24/2010 1:45:12 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 1 | View Replies]

To: onedoug
Why can´t we sample this ¨dark energy¨ directly as it´s supposed to be everywhere?

Just like we couldn't sample gamma rays 200 years ago or why we couldn't detect neutrino's a hundred years ago. They were everywhere and we didn't know it.

How many neutrinos do you see fly through your eyeballs each day?

19 posted on 11/24/2010 1:47:05 PM PST by SeeSac
[ Post Reply | Private Reply | To 17 | View Replies]

To: onedoug
Why can´t we sample this ¨dark energy¨ directly as it´s supposed to be everywhere?

Do you have a 'dark' hair-blower , or any 'dark' lights?

If not, then what do you need dark energy outlets for?

Is it the name that bothers you? Because we can call it 'magic pixie dust', if people will just quite demanding that scientists actually produce some.

20 posted on 11/24/2010 1:49:34 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 17 | View Replies]

To: Cicero
If the universe is flat, does it sit on the back of a turtle?

Assuming turtles are flat, then yes.


21 posted on 11/24/2010 1:52:34 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 10 | View Replies]

To: NormsRevenge

“dark energy” - powering nobama, reid and pelosi since at least 2008.


22 posted on 11/24/2010 1:54:59 PM PST by upchuck (When excerpting please use the entire 300 words we are allowed. No more one or two sentence posts!)
[ Post Reply | Private Reply | To 1 | View Replies]

To: NormsRevenge
I LIKE SIMPLE!


23 posted on 11/24/2010 1:57:29 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 1 | View Replies]

To: SeeSac

Though now we know that neutrinos are there. Quark or string level for dark matter?


24 posted on 11/24/2010 2:00:33 PM PST by onedoug
[ Post Reply | Private Reply | To 19 | View Replies]

To: Cicero

Wow. Disk World is real after all?


25 posted on 11/24/2010 2:01:15 PM PST by married21 (As for me and my house, we will serve the Lord.)
[ Post Reply | Private Reply | To 10 | View Replies]

To: SunkenCiv; CJ Wolf; houeto; Quix; null and void; B4Ranch; Whenifhow; Silentgypsy; blam; FromLori; ..
"Space Energy/Solar Weirdness" ping.


Ping list dealing with odd space phenomena and solar events.

FReepmail me if you want on or off

The Comedian's "Space Energy/Solar Weirdness" ping list...


Frowning takes 68 muscles.
Smiling takes 6.
Pulling this trigger takes 2.
I'm lazy.

26 posted on 11/24/2010 2:08:29 PM PST by The Comedian (Government: Saving people from freedom since time immemorial.)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Fractal Trader

Why? For the usual reason one posits an unobserved entity in science—to explain things one observes which the observed entities and laws do not explain.

Personally, I suspect once one gets the quantum theory of gravity right (no, string theory isn’t it) the “need” for ‘dark matter’ and ‘dark energy’ go away.


27 posted on 11/24/2010 2:28:49 PM PST by The_Reader_David (And when they behead your own people in the wars which are to come, then you will know. . .)
[ Post Reply | Private Reply | To 9 | View Replies]

To: GreenHornet
What type of fabric is space and time made of? Is it washable, or should it be dry cleaned?

Absolutely dry-clean only. Just imagine how bad it could get with shrinkage!

28 posted on 11/24/2010 2:46:12 PM PST by zeugma (Ad Majorem Dei Gloriam)
[ Post Reply | Private Reply | To 13 | View Replies]

To: UCANSEE2

“It’s turtles all the way down.”


29 posted on 11/24/2010 2:49:40 PM PST by Cicero (Marcus Tullius.)
[ Post Reply | Private Reply | To 21 | View Replies]

To: zeugma

Watch out for the moths. They’re the ones that leave all the ‘black holes’.


30 posted on 11/24/2010 6:28:35 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 28 | View Replies]

To: Leftism is Mentally Deranged
They still don’t know, do they?

"Ya got that right, doc."


31 posted on 11/24/2010 6:38:57 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 15 | View Replies]

To: SeeSac
How many neutrinos do you see fly through your eyeballs each day?

Is one day like, just during the day? Or is it, like, uh, day and night together ?

32 posted on 11/24/2010 6:41:09 PM PST by UCANSEE2 (Lame and ill-informed post)
[ Post Reply | Private Reply | To 19 | View Replies]

To: UCANSEE2

You do realize that you’re missing a “Bristol Palin dancing with Mormons at a TSA check point while a Missile and or airplane flies overhead” thread by reading this science thread!!


33 posted on 11/24/2010 7:09:34 PM PST by The Cajun
[ Post Reply | Private Reply | To 32 | View Replies]

To: The Comedian; AdmSmith; bvw; callisto; ckilmer; dandelion; ganeshpuri89; gobucks; KevinDavis; ...
Thanks The Comedian.


· List topics · post a topic · subscribe · Google ·

34 posted on 11/24/2010 7:48:29 PM PST by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
[ Post Reply | Private Reply | To 26 | View Replies]

To: The Comedian

I’ll never forget how deeply I recognized this statement to be the truth.

“If you don’t read the newspaper, you are uninformed; if you do read the newspaper, you are misinformed.” Mark Twain

Consequently, I simultaneously became a doubter and a believer in almost everything until I had time to prove it to myself.


35 posted on 11/24/2010 8:45:30 PM PST by B4Ranch (I never met one Veteran who enlisted to fight for Socialism.)
[ Post Reply | Private Reply | To 26 | View Replies]

To: NormsRevenge

“Dark Matter” is a mathematical construct...it doesn’t actually exist. All that DM “explains” is why the universe expands at a faster rate each year.

Of course, the reality is that DM isn’t why the universe is expanding faster at all. It can’t explain it. Dark Matter doesn’t exist.


36 posted on 11/24/2010 8:49:39 PM PST by Southack (Media Bias means that Castro won't be punished for Cuban war crimes against Black Angolans in Africa)
[ Post Reply | Private Reply | To 1 | View Replies]

To: GreenHornet
What type of fabric is space and time made of? Is it washable, or should it be dry cleaned?

All I know is, if I get ketchup on it I'll catch hell from the Wife.


37 posted on 11/24/2010 9:00:38 PM PST by reagan_fanatic (Scratch a “progressive” and a fascist bleeds)
[ Post Reply | Private Reply | To 13 | View Replies]

To: NormsRevenge

It’s my understanding that the latest theory is that the universe is a bubble shaped like a mattress, and that it’s one of an infinite number of universes.


38 posted on 11/25/2010 7:06:12 AM PST by Rum Tum Tugger
[ Post Reply | Private Reply | To 1 | View Replies]

To: onedoug
[Why can´t we sample this ¨dark energy¨ directly as it´s supposed to be everywhere?]
 
Maybe because it's not uniformly distributed.   Think of the way salt crystals form within a solution, for example.   The energy constituting the universe is similarly lumpy -   both visible and not-so-visible.
 
That hypothesized invisible lumpiness is consistent with observable evidence for dark matter/energy ala gravitational lensing.
 
http://www.google.com/#sclient=psy&hl=en&q=gravitational+lensing+dark+matter
 
 
Consider also the issue of a conception of "dark matter" as being in a form equivalent to the matter we're used to interacting with. It's not.
 
Dark Mass would be more accurate than dark matter.
 
Presuming that matter is merely energy in a locally organized state, we can explain "dark" matter as localized energy where E is insufficient to manifest the strong forces required to form "normal" visible matter - but where the Mass associated with E is still present nonetheless.
 
Thus the effect of gravitational lensing produced by Mass that is essentially invisible.
 
 

39 posted on 11/25/2010 7:29:01 AM PST by LomanBill (Animals! The DemocRats blew up the windmill with an Acorn!)
[ Post Reply | Private Reply | To 17 | View Replies]

To: NormsRevenge
Moreover, the method - developed by revisiting a 30-year-old idea - confirms that "dark energy" makes up nearly three-quarters of the Universe.

So that's where my car keys went...
40 posted on 11/26/2010 2:50:17 AM PST by Right_Wing_Madman
[ Post Reply | Private Reply | To 1 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson