Dark matter networks visualized

dark matter networks

thenewenlightenmentage:

Cosmic ‘web’ seen for first time

The hidden tendrils of dark matter that underlie the visible Universe may have been traced out for the first time.

Cosmology theory predicts that galaxies are embedded in a cosmic web of “stuff”, most of which is dark matter.

Astronomers obtained the first direct images of a part of this network, by exploiting the fact that a luminous object called a quasar can act as a natural “cosmic flashlight”.

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I seem to be a verb, an evolutionary process – an integral function of the universe.

Quote in context:

“I live on Earth at present, and I don’t know what I am. I know that I am not a category. I am not a thing — a noun. I seem to be a verb, an evolutionary process – an integral function of the universe.

Buckminster Fuller, I Seem to Be a Verb (1970)

http://en.wikiquote.org/wiki/Buckminster_Fuller

http://en.wikipedia.org/wiki/Buckminster_Fuller

“Birth of a Photon,” a (notional?) art installation by Marco Casagrande:
http://casagrandetext.blogspot.com/2011/01/birth-of-photon.html

“The Birth of a Photon is connected to Albert Einstein’s initial discovery of the lichtquant, or photon – the basic unit of light and all other forms of electromagnetic radiation. […] 

The public artwork Birth of a Photon is a three dimensional artistic rendering describing the birth of the lichtquant, homage Albert Einstein. The sculpture is 14, 5 meters long and 2,2 meters high and wide and made out of shiny chrome steel.”

(See also my previous post on photons and boostrapping!)

image

An electromagnetic wave bootstraps itself through the void

Image 1: Source: Wikipedia article on “Electromagnetic radiation” (image source; cc-by-sa)

Caption: “Electromagnetic waves can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This 3D diagram shows a plane linearly polarized wave propagating from left to right.”

image

Image 2: Source: Wikipedia article on “Electromagnetic radiation” (image source; cc-by-sa)

Caption: “This 3D diagram shows a plane linearly polarized wave propagating from left to right. Note that the electric and magnetic fields in such a wave are in-phase with each other, reaching minima and maxima together.”

 image

Image 3: Source: Wikipedia article on “Electromagnetic radiation” (image source; cc-by-sa)

Caption: “The electromagnetic waves that compose electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This diagram shows a plane linearly polarized EMR wave propagating from left to right. The electric field is in a vertical plane and the magnetic field in a horizontal plane. The two types of fields in EMR waves are always in phase with each other with a fixed ratio of electric to magnetic field intensity.”

– – – – – – – – – – – – – – –

If compression waves, like sound, need to travel through a carrier medium, then how can electromagnetic waves propagate themselves through empty space?


A photon acts a little like the Glider in Conway’s Game of Life: at each step, it creates the conditions for the next step. Now, this is just one way of viewing an electromagnetic wave, and far from complete. But it’s interesting to think about!

More quotes from Wikipedia:

“Similar to the way that a changing magnetic field generates an electric field, a changing electric field generates a magnetic field. This fact is known as Maxwell’s correction to Ampère’s law. Maxwell’s correction to Ampère’s Law bootstrap together with Faraday’s law of induction to form electromagnetic waves, such as light. Thus, a changing electric field generates a changing magnetic field, which generates a changing electric field again.”

(Source: Wikipedia article on “Magnetic field”)

“A common misconception is that the E and B fields in electromagnetic radiation are out of phase because a change in one produces the other, and this would produce a phase difference between them as sinusoidal functions (as indeed happens in electromagnetic induction, and in the near-field close to antennas). However, in the far-field EM radiation which is described by the two source-free Maxwell curl operator equations, a more correct description is that a time-change in one type of field is proportional to a space-change in the other. These derivatives require that the E and B fields in EMR are in-phase (see math section below).”

(Source: Wikipedia article on “Electromagnetic radiation”)

And it gets weirder: 

According to the special theory of relativity, the partition of the electromagnetic force into separate electric and magnetic components is not fundamental, but varies with the observational frame of reference: An electric force perceived by one observer may be perceived by another (in a different frame of reference) as a magnetic force, or a mixture of electric and magnetic forces.

Formally, special relativity combines the electric and magnetic fields into a rank-2 tensor, called the electromagnetic tensor. Changing reference frames mixes these components. This is analogous to the way that special relativity mixes space and time into spacetime, and mass, momentum and energy into four-momentum.”

(Source: Wikipedia article on “Magnetic field”)

http://www.smbc-comics.com/?id=2833

I think *you’re* one of the good wobbles.

Awww but the combined one is sooo much better! http://r0m1n.minus.com/ly92QXzZkU2Wx … dang file-size limit

Glasses of Nerdicon, from Adventure Time episode “The Real You”

http://adventuretime.wikia.com/wiki/Glasses_of_Nerdicon

four-part gif via sugarlessponygum

(img source)

Lawrence Krauss, A Universe From Nothing: Why There is Something Rather than Nothing (2012)

http://en.wikipedia.org/wiki/Lawrence_M._Krauss

http://books.google.com/books/about/A_Universe_from_Nothing.html?id=nfGlsiDGbxkC

See also an excellent talk on the subject from 2009: http://www.youtube.com/watch?v=7ImvlS8PLIo

So we, and everything we see, result out of quantum fluctuations in what is essentially nothingness near the beginning of time, namely during the inflationary expansion.

Quote in context: 

“This results in the second amazing implication of inflation: That small density fluctuations in empty space, due to the rules of quantum mechanics, will later be responsible for all the structure we observe in the universe today.   

So we, and everything we see, result out of quantum fluctuations in what is essentially nothingness near the beginning of time, namely during the inflationary expansion.    

After all the dust has settled, the generic configuration of the matter and radiation will be that of an essentially flat universe, one in which the average Newtonian gravitational energy of all objects will appear to be zero.”

— Lawrence Krauss, A Universe From Nothing: Why There is Something Rather than Nothing (2012)

http://en.wikipedia.org/wiki/Lawrence_M._Krauss

http://books.google.com/books/about/A_Universe_from_Nothing.html?id=nfGlsiDGbxkC

See also an excellent talk on the subject from 2009: http://www.youtube.com/watch?v=7ImvlS8PLIo

Because there is a law such as gravity, the universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the universe exists, why we exist. It is not necessary to invoke God to light the blue touch paper and set the universe going.

Stephen Hawking and Leonard Mlodinow, The Grand Design (2010)

I offer the modest proposal that our Universe is simply one of those things which happen from time to time.

Quote in context: “If it is true that our Universe has a zero net value for all conserved quantities, then it may simply be a fluctuation of the vacuum, the vacuum of some larger space in which our Universe is imbedded. In answer to the question of why it happened, I offer the modest proposal that our Universe is simply one of those things which happen from time to time.”  

– Tryon, E.P., 1973. Is the Universe a Vacuum Fluctuation? Nature, 246(5433), 396-397. doi:10.1038/246396a0

http://www.nature.com/nature/journal/v246/n5433/abs/246396a0.html

http://en.wikipedia.org/wiki/Vacuum_genesis

You are the big bang, the original force of the universe, coming on as whoever you are.

It’s like you took a bottle of ink and you threw it at a wall. Smash! And all that ink spread. And in the middle, it’s dense, isn’t it? And as it gets out on the edge, the little droplets get finer and finer and make more complicated patterns, see? 

[…] If you think that you are only inside your skin, you define yourself as one very complicated little curlique, way out on the edge of that explosion. Way out in space, and way out in time.

Billions of years ago, you were a big bang, but now you’re a complicated human being. And then we cut ourselves off, and don’t feel that we’re still the big bang. But you are. […] You are still the process.    

You are the big bang, the original force of the universe, coming on as whoever you are.”

– Alan Watts, The Nature of Consciousness

http://deoxy.org/w_nature.htm

Through our eyes, the universe is perceiving itself. Through our ears, the universe is listening to its harmonies. We are the witnesses through which the universe becomes conscious of its glory, of its magnificence.

Attributed to Alan Watts, although it might be a paraphrase

bouncingdodecahedrons:

“We humans long to be connected with our origins, so we create rituals. Science is another way to express this longing. It also connects us with our origins, and it too has its rituals and its commandments. Its only sacred truth is that there are no sacred truths. All assumptions must be critically examined. Arguments from authority are worthless. Whatever is inconsistent with the facts, no matter how fond of it we are, must be discarded or revised. Science is not perfect, it’s often misused, it’s only a tool, but it’s the best tool we have. Self-correcting, ever-changing, applicable to everything. With this tool we vanquish the impossible. With the methods of science we have begun to explore the cosmos.” – Carl Sagan

Love the line art animation, but… is that a hydra turning into a urochordate tadpole larva?

The biologist George Wald once compared his work on an exceedingly specialized subject, the visual pigments of the eye, to ‘a very narrow window through which at a distance one can see only a crack of light. As one comes closer the view grows wider and wider, until finally through this same narrow window one is looking at the universe.

Rachel Carson, Silent Spring (1962)

Quote by George Wald, in context:

Years ago I used to worry about the degree to which I had specialized. Vision is limited enough, yet I was not really working on vision, for I hardly made contact with visual sensations, except as signals, nor with the nervous pathways, nor the structures of the eye, except the retina. Actually, my studies involved only the rods and cones of the retina, and in them only the visual pigments. A sadly limited peripheral business, fit for escapists. But it is as though this were a very narrow window through which at a distance one can see only a crack of light. As one comes closer the view grows wider and wider, until finally through this same narrow window one is looking at the universe.”

(Unsure of original source; quoted here)