What is Digg?145 Comments
- Rollic, on 11/24/2008, -5/+93Bad Nibbler!
- jmkiii, on 11/24/2008, -5/+81"How long, you may ask, is a light year?"
*sigh - Renton, on 11/24/2008, -1/+56"There are some stars in the universe that are over one billion light years away!"
This feels like it was written for 3rd graders... - twertyto, on 11/25/2008, -0/+46I got a feeling from look at the five comments above that the rest are going to suck.
Anyway I thought that dark matter was around 20% of the universe and around 75% was dark energy with the rest being visible matter. Are they combining both together here? Later in article they do make a distinction. I haven't heard about this 'discovery' before so I have to ask, what the hell is russiatoday.com? - inactive, on 11/25/2008, -37/+71……………………._„„„--~""""¯""~-,
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.………...,'::::::::::::",:,-~"¯::::|::::"-,::::::::::|:::/;;;;;;;;;;;;;;;;;;;,':::::::|::::,' STUDIES SHOW THAT DARK MATTER
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.::::::::::::::::::::::::::::::::::::::::|::::::::::::::::::::::............... - Mujokan, on 11/25/2008, -1/+28Pretty bad article. A couple of alternatives:
http://www.nytimes.com/2008/11/25/science/25dark.h ... http://blog.wired.com/wiredscience/2008/11/darkmat ... - wontstoptalking, on 11/24/2008, -9/+33If the LHC could have just killed us all a few months ago we wouldn't have to deal with this now!
- dsmx, on 11/25/2008, -5/+28a year.
- inactive, on 11/25/2008, -5/+28The article was crap! Barely anything about the new discovery (typical) and explanations on what light year is, a mere hint on what dark matter does and is, and plenty of filler on gravitational lensing - they author of this did not spend dick for time on it.
Still Dugg for science and not being pop culture. - KnightofOrder, on 11/25/2008, -1/+21The speed of light in a vacuum is constant. And the distance light travels in a year in a vacuum is constant so a perfect light year is constant.
- trogdor282, on 11/25/2008, -1/+21Actually in a medium the light still goes at the 'speed of light', but it takes a pit stop every time it strikes an atom. The pauses reduce the average speed. The instantaneous speed of a photon is indeed a constant.
- souljaboy6666, on 11/25/2008, -1/+18Its a ***** dinosaur with a hat and a monocle; this is the greatest thing I've ever seen on digg.
- Myztry, on 11/25/2008, -1/+18Dark matter hasn't been found at all. There are anomalies which the scientist are unable to explain, and Dark Matter is what they used to help balance the equation against KNOWN system properties.
Dark matter is referred to as being dark as it cast no light like frequencies (visible or not) so is not directly detectable.
Dark matter is referred to as matter due to an apparent gravitational effect on other particles.
Magnetic fields cast no light like particles yet have attractive/repulsive properties towards other matter. But we don't go calling magnetic fields Dark Matter (though they are generally bound to known elements).
Perhaps it's not particles at all that have these Dark Matter properties. Perhaps it's the branes (yet another wild theory to fill the gaps) that have these gravitational mass properties, and matter is an amplifier rather than the source of effect.
Any guess has possibilities- but lets not pretend that Dark Matter is known. Dark matter may indeed be a combination of other properties, and not an entity in itself. - DeFex, on 11/25/2008, -1/+15What they didnt explain it in football fields? how is anyone supposed to understand that.
- trogdor282, on 11/25/2008, -0/+13Correct, article is crap.
- rpapi100, on 11/25/2008, -0/+13Ok guys, by the looks of the digging trends for this article, it seems retardness is not working right now, so everyone take out the mustaches cause this is serious business.
- inactive, on 11/25/2008, -0/+12yeah with inaccurate data.
- mamboboy, on 11/25/2008, -0/+11It rapes you in your sleep.
- gbomb323, on 11/25/2008, -1/+11Description:
"Scientists have discovered an elusive substance known as dark matter - which experts believe makes up 90 percent of the universe."
FTA:
"Scientists THINK THEY MAY HAVE discovered an elusive substance known as dark matter - which experts believe makes up 90 percent of the universe."
There's a big difference, OP. - oneoverzero, on 11/25/2008, -3/+12The speed of light in water is 133% slower than it is in a vacuum.
The speed of light isn't mostly the same speed everywhere, and it isn't taken to be.
When people say the speed of light, they mean the speed of light in a vacuum. - trogdor282, on 11/25/2008, -0/+9Meh, time travel sucks, you just end up becoming your own grandpa or something.
- m0tbaillie, on 11/25/2008, -4/+13This article is ridiculous. We were talking about dark matter a week ago in a class of mine and my professor (MIT grad, so, not some crackpot) said the scientific community at large has know of and accepted the notion of dark matter/energy for over a decade and it has been postulated (vaguely) since the 60s.
Buried for being almost 50 years late. - ilessthan3pi, on 11/25/2008, -0/+8Win.
- MikeyMoose, on 01/30/2009, -1/+9Worst "science" ever...
- BradHAWK, on 11/25/2008, -0/+7For those of us living in the metric world, how many cmdrtacos are in 50 kevinroses?
- GraceHead, on 11/25/2008, -1/+8article says nothing
- staffa, on 11/25/2008, -0/+7Dark matter is a euphemism for 'we don't know'
The thing to remember about dark matter is that there might be many many different types of it. It might be as varied and complex as the matter we do understand. With all kinds of forces interacting amongst themselves.
What we do know is that it only interacts with us via gravity. For all we know the dark matter is another set of galaxies/stars/planets to whom which we are the dark matter. But we can only detect each other via gravity, which has really ***** resolution.
Dark energy is even a bigger mystery, my opinion is that it is a very tiny repulsive force cubic meter of space. Anti gravity if you will. For every cubic meter of space, there is a force pushing things apart. Now, if the cubic meter is a solid block of lead, the chemical forces holding it together are several hundred orders of magnitude stronger then this force. In fact it is so small that I don't think it has ever been measured in the laboratory. It is really small. It is so small that it can't even push away a tiny little mote of dust orbiting the sun a light year away. But we think it is there, we think it is there because when the void of matter is a few hundred million light years across, we can actually see it pushing galaxies apart. The weird thing about dark energy is that as it pushes galaxies apart, it increases the distances between them, as the distances increases the accumulative force pushing them apart also increases.
Most scientists like to keep the books balanced and the amount of energy needed to push the galactic clusters apart amounts to 3 times as much matter(after we convert both to same units using e=mc^2) we can account for(including dark matter)
I am not sure balancing dark energy makes sense, as in a few million trillion years, as the voids increase to even more utterly obscene sizes, dark energy will increase to nearly 99.999...% of the mass/energy of the Universe, it is exponentially increasing towards infinity.
There are are two lines of thought on dark energy, one goes that it is increasing per cubic meter, in which case eventually gravity bound objects will separate and eventually even chemically bound and then nucleate bound(IE, the atoms in your body will fly apart)
The other line of thought is that it is not increasing, thus gravity bound objects shall remain bound in perpetually.
I wonder if it could be getting weaker over time, still a net push creating more distance between galactic clusters, thus increasing the rate of their separation but the rate at which it is increasing the distance per a constant distance could still be decreasing. If it ever goes negative it could become a sort of super gravity and eventually collapse everything back down, making the Universe cyclical again. Maybe the Big Crunch wasn't wrong, it just needs some calculus applied to dark energy.
What was I talking about? I got lost in my thoughts, damn I love physics. - dasmonki, on 11/25/2008, -1/+8oh come on, this was funny
- kerosion, on 11/25/2008, -0/+7But making some advertising dollars on an empty article with a catchy headline.
- sgtbutterscotch, on 11/25/2008, -0/+6@stupidfilters
That is not mathematically rigorous. And I think you may be confusing the math for a decrease in something with the math for an increase in something.
Say you have 50 kevinroses and you want to decrease to 25 kevinroses, which is 50% the original. You have to give away 50% of the kevinroses in order to get to 50% of the kevinroses that you had. - sanman, on 11/25/2008, -1/+6maybe it's just neutrinos
they were recently found to have more mass than originally thought - Myztry, on 11/25/2008, -9/+14Depends. Light has a maximum speed, but can be slowed under certain conditions...
The speed of light isn't actually a constant. - Grin23, on 11/25/2008, -0/+5you obviously didnt read at all..... buried
- Wisgary, on 11/25/2008, -0/+5I prefer the concept of furlongs myself. In fortnights, if at all possible.
- byronm, on 11/25/2008, -0/+5Dark Matter is theoretical matter, i'm guessing this crappy article was supposed to shed light on physical evidence/scientific evidence but its rather lacking in details. I'll wait until i see papers on Arxiv
- TSK05, on 11/25/2008, -0/+4Heard about it in astro class earlier today, here is a better link: http://www.nytimes.com/2008/11/25/science/25dark.h ...
- byronm, on 11/25/2008, -0/+4Essentially everything in our known universe is "light matter" if thats how you want to describe it - based off our perception of electromagnetic radiation.
Go watch the PBS Documentary on E=mc2, it really simplifies the universe into energy as we understand it, mass as we understand it and energies that we theorize because we don't have any way to explain it :) (thus dark energy/dark matter) - jgzman, on 11/25/2008, -2/+6units?
- snoogit, on 11/25/2008, -0/+4That explains my IBS.
- cyb3rdemon, on 11/25/2008, -0/+4http://abstrusegoose.com/78
- clark24, on 11/25/2008, -0/+4Digg version of news:
"Scientists have discovered an elusive substance known as dark matter - which experts believe makes up 90 percent of the universe. It’s hoped it may hold the key to how and when the universe was formed."
From TFA:
"Scientists think they may have discovered an elusive substance known as dark matter - which experts believe makes up 90 percent of the universe. It’s hoped it may hold the key to how and when the universe was formed."
They haven't found anything yet. - ericthegreat, on 11/25/2008, -0/+4More likely, it was written by a 3rd grader.
- sgtbutterscotch, on 11/25/2008, -1/+5@jowSithm
Obviously in water light goes in the opposite direction.
/s
Seriously, I was wondering what he meant by that too. - jowSithm, on 11/25/2008, -2/+6oneoverzerooneoverzero: "The speed of light in water is 133% slower than it is in a vacuum."
How the heck does that happen? If you take 100% of something's speed away, then it is no longer moving. How do you take 133% of somethings speed? ...Although something can go 133% faster than something else. - trogdor282, on 11/25/2008, -2/+5over 9000
- Trollbane, on 11/25/2008, -0/+3O RLY?
http://emporium.turnpike.net/C/cs/ - ZorkFox, on 11/25/2008, -0/+3Why did this make it onto Digg in the SCIENCE section? The article is poorly written and contains nothing of scientific interest, just some claims and a few quotes. It's like some middle schooler's book report for science class in which he was tasked with reporting on some current problem in astrophysics, and felt it necessary to provide some background on dark matter.
- entropysteak, on 11/25/2008, -0/+3seriously. this is how i feel every time i watch the universe on the history channel. i always hope it will be new and exciting information but it is always the same regurgitated crap.
- Volatile36, on 11/25/2008, -0/+3Go live in a cave, then.
BAD SCIENCE ARRRGGHHHHHHHHHHHH!!! -
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