What is Digg?27 Comments
- the_d, on 10/12/2007, -0/+8Pfft. Voyager runs on Antimatter, not Darkmatter.
I cry at night because I know these things. - SanderScamper, on 10/12/2007, -1/+7Ok, can someone PLEASE direct me to where it's said that string theory is useless? As far as I know String theory is still going pretty strong, free of mathematical anomolies and althought it's still not falsifiable, I don't have any problems with it. One of the tennets of string theory is that there are parallel universes on different "branes" short for membranes, like each slice on a loaf of bread, these universes are parallel and do not intersect. A theory is that gravity is the only of the 4 fundamental forces that is not confined to our brane or universe, and the reason that gravity is billions of times smaller than our own is because we only experience the gravitons that have not escaped our brane. Think about this for a second and realise what I've realised (I don't know if this has already been stated elsewhere or thought of by someone else) What we percieve as dark matter may NOT in fact be real MATTER. We see dark matter's effects, IE, gravity. According to string theory if a significant gravitational force exists in a parallel brane at a point equivelant to a point in our own universe/brane then we would see the effects of that gravity. Thus, a proof for String Theory is possible. If we go to a point where they've discovered dark matter's supposed effects (like recently, by NASA) and find NO actual matter, then the gravity must come from elsewhere. The only viable alternate source is a parallel brane.
Maybe Digg isn't the best place to talk about this but I just fail to see the need for dark matter. - foolonthehill, on 10/12/2007, -0/+6@wrldpc - Dark matter most certainly does exist. If you mean that there is not enough of it to explain the gravitional effects observed in galaxies, then no-one can say you're wrong. However, dark matter has become a very widely accepted part of our current cosmological model because it works damn well. I'm afraid the article you link to is mostly just laughable non-science and falls very sort of being any sort of alternative theory.
- LucasVB, on 10/12/2007, -0/+5It's a very accessible article, quite clear on the explanation. And he didn't omit the numbers being dealt with, which is great! Dugg.
- SanderScamper, on 10/12/2007, -0/+5Wrong, the math for the Big Bang Theory works almost perfectly and explains all the matter we see and the correct ratios of different elements that exist right around the universe.
Dark Matter was invented as a way to explain how there is so much gravitational pull in a universe of so little matter in comparison. Read my above comment. - lazydrumhead, on 10/12/2007, -4/+9Don't underestimate the power of the dark side.
- Zippo, on 10/12/2007, -2/+6I'm still pissed at Dark Matter for possessing Metaknight... not to mention all the other ***** he's caused for Kirby.
- foolonthehill, on 10/12/2007, -0/+3I feel he could have explained a bit more about the first Friedmann equation and how the rate of expansion of the universe has changed over time, while still within layman's terms. Apart from that it's a pretty good article.
- foolonthehill, on 10/12/2007, -0/+3@rysolag - Read the last five lines of the article. Maybe we have got it wrong, but scientific explanaitons are always open to refinement or correction to explain observed phenomenta. The current theories are the most straightforward and robust model we have.
- rolotomasi, on 10/12/2007, -0/+2Maybe you're confusing it with the Planet Express Ship?
- hadak, on 10/12/2007, -0/+2Someone stupify that. It's too early to be reading ***** like that...
- basselope, on 10/12/2007, -0/+2First... Yes, I'm stupid.
Next, I don't understand this sentence from the article:
"Recently, NASA’s Wilkinson Microwave Anisotropy Probe (WMAP) satellite made precision measurements of the imprint of sound waves on the cosmic microwave background, produced some 400,000 years after the big bang."
Sound waves? I don't get that at all... what media did they travel through?
What was 400,000 years later? The imprint? The creation of the sound waves?
How did sound waves manage to imprint on the microwave background?
I can understand Loop Quantum Gravity more than I understand that sentence. I'm not saying it's wrong, It just hasn't clicked. - iamdan1, on 10/12/2007, -0/+2Dark Matter does not answer everything. There is another idea that is plausible, and it does not rely on something that can't be proven to actually be there. Check out work by Mordehai Milgrom, who has used Newton's laws to create a modified Newtonian dynamics to help explain why the universe does what it does. It is a plausible idea, I'm not saying its the right idea, its just one idea. Check it out, http://ca.geocities.com/mercy@rogers.com/ . I am sure there are many other articles about it, there was one in a recent issue of Discover Magazine.
- inactive, on 10/12/2007, -1/+3the math for the big bang theory didnt work out so they invented dark matter so it would.
heres a good torrent on dark matter:
http://torrentspy.com/torrent/571222/BBC_Horizon_Most_of_our_Universe_is_Missing_2006 - carve, on 10/12/2007, -1/+3Mind blowing stuff. So, if we were to travel to one of these "dark matter" gravity wells, and let it pull us, would we be pulled into one of these parallel branes?
- bflfab, on 10/12/2007, -0/+1following foolonthehill's comment, here is a quick Friedmann equation java applet. Kinda neat.
http://www.astro.virginia.edu/~jh8h/Foundations/Foundations_1/Friedmann.html
Also, the text that goes along with the applet is here http://www.astro.virginia.edu/~jh8h/Foundations/Foundations_1/chapter11.html - rysolag, on 10/12/2007, -2/+3Aren't they assuming that space-time is flat in the absence of matter? Can't it be that locally(for dark matter) that space-time is indented due to the galaxy? And that on a larger scale(for the dark energy) that space-time is some sort of cone shape and not a flat disc. *****' a, this ***** pisses me off. Figure it out already; it's '06.
- trghpy, on 10/12/2007, -0/+1They're waves of radiation and energy which are convienently converted into sound files so humans can feel like they're a part of the discovery. Maybe someone more interested can re-post Seti's sound files.
- basselope, on 10/12/2007, -0/+1@iamdan1
I checked out the Milgrom article - I kinda get the idea, but I just can't help but wonder if spiral galaxies don't put a kink in the solution... effectively reversing the trouble spots.
A spiral galaxy would suggest that the outer bodies are orbiting at slower pace than the inner ones, just as we would expect under classical Newtonian views.
I'll have to do some more reading on this
Interesting read, tho. Thanks! - mcsolas, on 10/12/2007, -0/+0from the article:
"It is estimated that our solar system is passing through a fine sea of dark matter particles with a (very high density)" - paraphrased to remove estimated technobabble
Maybe dark matter is the constant force in the universe. The effect we call Gravity is from the grouped electromagnetic fields of matter mutually shielding from the constant. The effect is the same, the apple still falls on Newtons head, but just for a different reason. - carve, on 10/12/2007, -2/+1WTF! Who diggs someone down for asking a serious question?
- KenMo, on 10/12/2007, -8/+6Well, I don't know what they are, but I know they are caused by driving SUVs or by drilling for oil off the coast of California.
We must act now to stop what we are doing to cause this before the creation of Dark Matter and Dark Energy reach the point where Galactic Warming starts. - EvilTesdall, on 10/12/2007, -5/+0wha...
- AussieOnline, on 10/12/2007, -6/+0Uh Huh. The earth is flat. The stars and sun revolve around the earth. The earth is round, but still the center of the universe. The earth orbits the sun, but the sun fuel cell will one day run out.
Why are so many fantastic minds spending their lifetimes on the minuscule concerns of dark energy and dark manner, which has to exist in order to support a now confirmed useless string theory, which came into being to try to explain away the issues with gravity stuffing up the calculations regarding expansion of the universe. I don't give a stuff about quarks, quantum theory or pancake shaped string theory universes - I want these geniuses to figure out where we're going to go next since we've totally stuffed this place up. - azad, on 10/12/2007, -8/+0fine article i agree with that
- inactive, on 10/12/2007, -10/+2there is no such thing as dark matter.
all dark matter is wrongly interpreted accumulations of EM energy.
http://www.theflowingofthedao.com/wordpress/?p=1416
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