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Distant Galaxies Confirm Accelerating Growth of Universe, Dark Energy


Science & Tech  (tags: astronomy, computers, concept, discovery, investigation, NewTechnology, research, scientists, space, study )

Kit
- 889 days ago - livescience.com
The pesky reality that the universe's expansion is accelerating -- an observation that prompted astronomers to invoke an unknown entity called dark energy to explain it -- has been further confirmed by new measurements.



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Comments

Betsy Bee (1058)
Friday April 13, 2012, 8:24 pm
Dark energy. But energy is light and heat .... not always true hocus-pocus.
 

Kit B. (276)
Friday April 13, 2012, 8:24 pm
CREDIT: Masamune Oguri, Naohisa Inada et al

The pesky reality that the universe's expansion is accelerating — an observation that prompted astronomers to invoke an unknown entity called dark energy to explain it — has been further confirmed by new measurements.

Scientists have used cosmic magnifying glasses called gravitational lenses to observe super-bright distant galaxies, giving a measure of how quickly the universe is blowing up like a giant balloon. They found, in agreement with previous measurements, that the universe's expansion is indeed speeding up over time.

The first measurement of this phenomenon, based on exploding stars called supernovae, was made in the 1990s.

"The accelerated cosmic expansion is one of the central problems in modern cosmology," Masamune Oguri, of the University of Tokyo's Kavli Institute for the Physics and Mathematics of the Universe, said in a statement. "In 2011 the Nobel Prize in Physics was awarded to the discovery of the accelerated expansion of the universe using observations of distant supernovae. A caution is that this method using supernovae is built on several assumptions, and therefore independent checks of the result are important in order to draw any robust conclusion."
****

Clara Moskowitz, SPACE.com Assistant Managing Editor | Live Science |

Full article at Visit Site.


 

Betsy Bee (1058)
Friday April 13, 2012, 8:25 pm
You really do not want to consider what will happen when the Moon is too far from Earth to cause any tide whatsoever. I do not want to consider that situation either.
 

Kit B. (276)
Friday April 13, 2012, 8:27 pm

Dark Energy or Dark Matter -- More is unknown than is known. We know how much dark energy there is because we know how it affects the Universe's expansion. Other than that, it is a complete mystery. But it is an important mystery. It turns out that roughly 70% of the Universe is dark energy. Dark matter makes up about 25%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter - adds up to less than 5% of the Universe. Come to think of it, maybe it shouldn't be called "normal" matter at all, since it is such a small fraction of the Universe.

http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/
 

michael hall (42)
Friday April 13, 2012, 8:27 pm
4% of the universe is what we perceive as light/matter..the other 96% is dark matter and dark energy..wonderous
 

Betsy Bee (1058)
Friday April 13, 2012, 8:28 pm
This is very interesting. I am going to forward this to my husband back in Vermont. He is a math PhD but good at this spacey stuff. If I make another comment, it might just make sense.
 

michael hall (42)
Friday April 13, 2012, 8:30 pm
dark matter is the scaffolding for the galaxies and such,,,dark energy is the nemesis of gravity and is responsible for the'accelerating' expansion in our mutli-verse...
 

michael hall (42)
Friday April 13, 2012, 8:33 pm
chasing ghosts in the sunlight with insufficient tools...i sure do love quantum mechanics and exotic theories...
 

Betsy Bee (1058)
Friday April 13, 2012, 8:37 pm
Kit and Michael, can you suggest a verb that is the opposite of levitate -- maybe gravitate? Oh well, my next comment may make sense.
 

Dave C. (214)
Saturday April 14, 2012, 12:19 pm
dark energy is what I think powers Mr.Cheney.....in seriousness, this is really really interesting....
 

Mm M. (456)
Saturday April 14, 2012, 1:05 pm
Thank you Kit...I am always interested in this!
 

Carmen S. (611)
Saturday April 14, 2012, 1:43 pm
Very interesting, thanks Kit
 

Myron Scott (70)
Saturday April 14, 2012, 2:53 pm
Excellent posting Kit. I've been unavoidably MIA from seeking as well submitting stories of late, and this is one of my favorite areas of new knowledge; so I especially value posts like this. These are exciting times in cosmology.
 

Betsy Bee (1058)
Saturday April 14, 2012, 3:21 pm
My Vermont wolf elf math PhD husband, just sent me an email summary of his better informed half of our conversation this morning:

"Dark energy and dark matter are basicallly euphemisms for some missing energy and matter. It seems that the universe should be expanding a lot more rapidly and there must be a huge gravitational attraction holding it back, holding it all together. Nobody has found it yet, nor imagined its form, but there is a whole lot of missing stuff if all the other rules of the universe are to work. Very disturbing, wouldn't you say? Maybe some might celestial crab is holding onto everything not to let it escape. I tell you, the more physics they study, the more they see they don't know, and what is unknown seems to be terribly basic."
 

Past Member (0)
Saturday April 14, 2012, 3:55 pm
Thank you for article.
 

Myron Scott (70)
Saturday April 14, 2012, 4:19 pm
Dark matter and dark energy are hypothetical constructs, but that doesn't make me uncomfortable. Why should it? Hypotheses are for testing.

So far, the researches of both the Large Hadron Collider at the micro level and the various projects for deep space investigation at the macro have tended to confirm both Relativity and Quantum Mechanics. The few exceptions that have seemed to be demonstrated have tended to be disproved upon further investigation, most recently the supposed exception to the "universal" speed of light "speed limit" posited by Einstein. Both
theories are proving quite durable; but no one - not Bohr, Heidegger, Schrodinger, Newton for that matter; or, least of all, Einstein - claimed to have spoken the last word.

Further research will fill in the missing details of those theories and resolve the questions they raise; but it will take as long as it takes. New data might even require replacing one or another with a new theory. Again, so what? That is how science works.

What would truly discomfort me would be if we ever should stop asking such questions and seeking such answers. Considering how long it took our species to get to the new physics of relativity and quantum mechanics and how new the tools are that we now are using to search beyond their limits, I see no particular cause for impatience.

Rather, I find the whole venture fascinating.
 

Frank S. (456)
Saturday April 14, 2012, 4:24 pm
Kit, here is an important and fascinating five page article on “Dark Energy.” It is from the Smithsonian so enjoy! I’m feeling too lazy to research the God particle’s dark energy at present. So instead, I will personally concentrate on solving the mystery of the “black hole tummy particle” which is presently a far more urgent task for me, since I just woke up from a nap feeling dreadfully hungry, lol!

• Science & Nature

Dark Energy: The Biggest Mystery in the Universe

At the South Pole, astronomers try to unravel a force greater than gravity that will determine the fate of the cosmos
• By Richard Panek
• Smithsonian magazine, April 2010,

“The head of the committee that wrote the report, University of Chicago cosmologist Michael S. Turner, goes further and ranks dark energy as “the most profound mystery in all of science.”- smithsonianmag.com

http://www.smithsonianmag.com/science-nature/Dark-Energy-The-Biggest-Mystery-in-the-Universe.html?c=y&page=1

 

Holly Lawrence (473)
Saturday April 14, 2012, 4:26 pm
I'm thankful we are learning more about Dark Energy ..so little has been known. The future of the Universe is in it's hands ...
 

Kit B. (276)
Saturday April 14, 2012, 4:29 pm

It is the most fascinating area of science, and sadly not my area. I follow along the trail blazers as best I can, learning with each book and article.

The term dark matter or dark energy should not be something to fear, they are words to explain the unknown. Space is vast, though we have made great leaps in understanding we are still on edge, or very beginning of the journey.

 

Val R. (243)
Saturday April 14, 2012, 6:00 pm
The bad thing is that they won't tell us more than they want and if we learn more they will discredit it
 

KS Goh (0)
Sunday April 15, 2012, 12:37 am
Thanks for the article.
 

Quanta Kiran (65)
Sunday April 15, 2012, 7:40 am
Thanks.
 

Kerrie G. (135)
Sunday April 15, 2012, 7:43 am
Noted, thanks.
 

Betsy Bee (1058)
Sunday April 15, 2012, 8:09 am
Sort of a reply to Myron from my spouse in Vermont:

I was just astonished at how evasive the basics seem to be, just barely hinting that maybe there is a plot to keep the real knowledge from us. Should we not be awed that we don't detect most of the matter and energy out there? How comfortable should we be when we act so knowledgeable and know so little?
 

Kit B. (276)
Sunday April 15, 2012, 8:25 am

I doubt there is plot, just simply a lack of science and math education in this country, I suppose that could be seen as a plot. There are no schemes of deception in science as it would only aid in discrediting the field. Science is open and waiting for all of us to learn, to reach to understand. Again my fields of science are far more earth bound, that however doesn't hold me back from my natural curiosity and deep desire to know and learn more.
 

Past Member (0)
Sunday April 15, 2012, 8:40 am
Tamna energija.Najvise je ima medju pokvarenim i bezobzirnim ljudima
 

Myron Scott (70)
Monday April 16, 2012, 6:34 am
Bee, I definitely agree. We always should act as if we didn't know everything; chances are, we don't.
 

Penelope P. (222)
Monday April 16, 2012, 7:43 am
Ta Kit-The most interesting thing about this ton me is that it demonstrates how little we know
 

Nancy C. (798)
Monday April 16, 2012, 10:41 am
Dark energy~the force that's counteracting gravity! I love this stuff...I am enamored with terms and studies of ( for ex) bending space-time which happens to quasar light passing massive objects on its way to our telescopes!!! We'll be able to gauge the speed of the expansion by the frequency of (gravitationally lensed) quasar light which becomes less frequent...cool The link to a video is terrific too...
 
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