Discussion in 'Free Thoughts' started by Magical Realist, Oct 26, 2013.
That's not what dark matter looks like. That's not how it behaves.
"They" don't exist.
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"The mysterious dark matter that makes up most of the matter in the universe could be composed, in part, of invisible and nearly intangible counterparts of atoms, protons and electrons, researchers say.
Dark matter is an invisible substance thought to make up five-sixths of all matter in the universe. Scientists inferred the existence of dark matter via its gravitational effects on the movements of stars and galaxies.
Most researchers think dark matter is composed of a new type of particle, one that interacts very weakly at best with all the known forces of the universe save gravity. As such, dark matter can almost never be seen or touched, and rarely even collides with itself. [Gallery: Dark Matter Across the Universe]
This might not hold true for all forms of dark matter, though. Now, some researchers suggest a new kind of dark matter could exist, representing about one-fifth of all dark matter in the universe, making it potentially as plentiful as conventional matter.
"There is no good reason to assume that all the dark matter in the universe is built out of one type of particle," study author Andrey Katz of Harvard University told SPACE.com.
These new dark matter particles would essentially consist of heavy "dark protons" and light "dark electrons." They would interact with each other far more than other dark matter particles to form "dark atoms" that use "dark photons" to interact through a sort of "dark electromagnetism," much as regular protons and electrons interact through photons in conventional electromagnetism to build the atoms making up the stuff of everyday life. If dark atoms are possible, they could react with each other for dark chemistry, much as regular atoms interact chemically.
"The dark world might even be as diverse and interesting as the visible world," Katz and his colleagues wrote May 23 in the journal Physical Review Letters.
The interactions between dark protons and dark electrons could make them lose energy over time. As such, they might slow down enough to clump into flat disks around galaxies, just like regular matter does. In contrast, most dark matter apparently forms roughly spherical haloes around galaxies, stars and planets.
This concept means galaxies would have two disks, one made of regular atoms and one of dark atoms, which is why the investigators call their idea the double-disk dark matter model.
"The double-disk dark matter idea is a novel twist on an intriguing concept — that the physics of dark matter might be as complicated and interesting as the physics of ordinary matter is known to be," said theoretical physicist Sean Carroll of the California Institute of Technology, who did not take part in this study.
Carroll and his colleagues had earlier suggested "the basic possibility of a dark force very similar to electromagnetism — a long-range force with positive and negative charges," he said. "Such a model implies dark radiation, dark magnetic fields, and a host of other interesting phenomena. But we only had one kind of dark-matter particle in our model; to go to the world of dark atoms and dark chemistry requires more kinds of particles. That's the direction the new papers are taking."
The gravitational effects of a dark atom disk on stars in galaxies could eventually be detectable via the European Space Agency's Gaia space observatory scheduled to launch in October, which aims to map the movement of approximately 1 billion stars in the Milky Way.
"This is how we might first detect this dark disk," Katz said.
Moreover, since this novel form of dark matter is expected to be much slower on average than regular dark matter, it should be more susceptible "for capture by the Earth, by the sun, or other heavy celestial objects," Katz said. "Annihilation of this dark matter captured by the sun can result in neutrino fluxes, which can be measured directly by the IceCube Neutrino Observatory on the South Pole."
In addition, the dark electrons and dark protons the scientists propose might also have antimatter counterparts — dark anti-electrons and dark anti-protons. When these particles collide with their counterparts, they would release gamma rays, the most energetic form of light, which telescopes should be able to spot. Furthermore, dark atoms might also have formed clouds of dark plasma, ripples in which might have influenced the formation of the early universe and thus have visible effects on large-scale cosmic structures that exist nowadays.
"Theories of dark matter with new forces provide a wonderful playground for theorists to develop new models of particle physics," Carroll said. "The hard part will be getting the astrophysics right — how does the dark matter evolve and cluster? In the observable world, the presence of electromagnetic fields makes that a very hard problem — when you add dark electromagnetism to the mix, it will only get harder!"----http://www.space.com/21508-dark-matter-atoms-disks.html
Yes it is. We "see" dark matter as well as black holes and neutron stars by the gravitational lensing effect it has on the light around it. IOW, the light tends to go around the mass representing a visual distortion in space. Since we have no idea as to the density of shadow people, it's feasible they could appear as patches of darkness.
c'mon wegs, why not? Dark atoms! Why can't we have dark atoms? Or dark anti-matter annihilating dark matter? I dunno, it's getting too complicated. Let's just say that science must accomidate ghost theory because some people see shadow figures.:shrug:
You're an atheist, which is itself an insult.
Not to get off topic Magic, but you're completely and absolutely wrong about the spaceman picture.
look at the below picture.
Amazing what false coloration can do! lol! No...it's not the mother. The suit is white not blue. Blue dresses in the sunshine do not suddely turn white.
Wow, the ignorance is astounding. Notice the background is blurred as it's in the distance, just like the mother and the angle of the sunlight which can be seen on the child's hair and face.
You shine light on a blue shirt at distance, it gets washed out.
False coloration? Give me a break.
How odd! There's an alien growing out of that little girl's head!
No, it isn't. "Patches of darkness" are not a property of dark matter, and there is no feasible means by which it could possibly appear as such.
So now that you tip-toed around it, you don't have the stones to actually say it to me?
Someone doesn't know how light or photographs work. lol
Oh crap, not that damn space man pic again! :roflmao: Magical...it's a hoax. Lol And it's a cheap hoax to boot.
You think fear holds me back from hurling an insult at you? you might be a decent guy and not deserving of an insult.
That's interesting, because you inferred that I was scum earlier.
Oh well. Now I know what you're made of.
Atheists like you are an example of what an atheist world will look like. No compassion. No forgiveness. No bible passages to bring peace. Atheists are ill equipped to lower hostilities between nations, between groups or between individuals. You can't even lower hostility between you and I. God help an atheist world.
Another ridiculous, broad-strokes condemnation of an entire class of people simply because I won't let you off the hook for calling me scum. You didn't even apologize, but it's just supposed to be okay? That's not how it works.
Baleron, you are not a righteous man before God. In a universe where there is five times more unseen matter than observable matter, you take a great risk of being wrong about the afterlife.
So now it's a hoax and not the mother? You guys really need to get your story straight.
Please Register or Log in to view the hidden image! One of two things...either it's an actual staged hoax (and cheaply constructed) OR...it's the mom, as has been discussed (and I posted a link not too long ago, asserting as such.)
It's not a 'real' space man. Like we batted around, it seems like a contrived idea as to how people back then, might have 'imagined' an alien to appear. (if it were staged as a hoax) Look at the alien movies over the past ten or so years...hmmm...nothing at all that resembles that silly space man from this photo. I lean towards it being the mom, and she just didn't catch the dad's eye when he took the photo Then, as the story grew legs, he/the family just went with it, even if he and the mother discussed it and realized it was her in the background from afar, at that point. The moral of the story...people are strange. Please Register or Log in to view the hidden image!
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