Probably it would be better, if description of this "demonstration" would be called simulation of expansion of universe.
And people, who wrote about dark matter, quantum rubbish - grow up, this is just a model and must say the idea is brilliantly simple and beautiful. The box is actually expanding universe(and it is not obvious to those who wrote comments, and also who didn't follow link) and represents how universe would expand in future(I assume current time there is just Z=1 or less).
@easgair current time is z=0. ANd this is NOT a simulation of how the universe expands. It probably takes expansion into account, but it's about structure's grow
Right. The frame of reference is "co-moving" so the "camera" expands along with the universe. Therefore, one cannot see expansion occurring in the video.
funny to read comments about Dark Matter from 1-2 years ago, when new discoveries happen so often. See BBC News for "A space telescope has accidentally spotted thunderstorms on Earth producing beams of antimatter."
@jNode Redshift of the initial light from the "big bang"? An other question that might sound stupid, does the distribution of mass begin as homogenous? If so why would one particle move to one direction and not to an other?
@goliathlup1 actually, the redshift of the light observed from distant objects which can be equated with an age of the universe (e.g., z = 8.6, corresponds to 600 million years after the big bang singularity, says wikipedia)...
@goliathlup1 ...not at all:-) only after ~400k years the universe became transparent and light started to travel (after being opaque, see decoupling in physical cosmology). this is also when the cosmic microwave background radiation was produced, which is observe today. the inhomogeneous distribution of this afterglow acted as the seeds for structure formation and are thought to have arisen from thermal variations generated by quantum fluctuations at early stages in the cosmic evolution.
@goliathlup1 indeed, the very early universe is thought to have been homogeneous and isotropic. for an interesting account of the stuff believed to have happened in the beginning, see steven weinberg's "the first three minutes".
the scientists have not yet explained why the "big bang" blew up the way it did. sped up then slowed down then sped up. my video presents the case against this commonly held "yo yo" theory of cosmic expansion
They have explained those things. For example, expansion began to speed up about 5 billion years ago because dark energy came to dominate over matter. As the universe expands, the density of matter decreases; but the density of dark energy remains constant. So while the densiy of matter dominated dark energy early on, dark energy came to dominate over matter, causing expansion to accelerate.
the scientists have not yet explained why the "big bang" blew up the way it did. sped up then slowed down then sped up. my video presents the case against this commonly held "yo yo" theory of cosmic expansion
Cold Dark Matter is what scientists like to call a *fudge factor* to bring equations into equilibrium.
Without it, it is impossible to account for the structure of the observed universe.
Of course, we've never seen it, felt it, detected it, analyzed it, tested it, etc.. etc.. etc.. yet we know it must be there because there is no other possible way to arrive at the observed structure of the universe without it, unless you believe the ridiculous electric universe theory of course.
A string theorist has suggested that dark matter could be masses in the other dimensions. As you know, in string theory, gravitons are the only particles allowed to travel between dimensions. What do you think of that?
lacking guidance from experimental feedback, theories of quantum gravity are elegant formal contraptions but highly speculative. applying such theories devised at a micro-level to cosmology doesn't make things better. and next to dark matter, there is still all that dark energy to account for...
data from the LHC validating/falsifying supersymmetry, higher dimensions, etc. would help. but i'm expecting the LHC to not even come up with a physical Higgs boson...
If you correct the Newtonian gravitational force by multiplying it by a cosine with a wavelength on the scale of a typical galaxy, you can see how ring galaxies form. That's a quantum-based correction that considers the graviton as carrying a gravity force vector rotating analogously to the E and M vectors of the photon, but much slower, consistent with the low energy that gravitational quanta must posess if they exist.
There is. Check out Nassim Haramein. Current physics are obviously wrong because they ignore spin, no wonder scientists miss like 99% of the needed mass and energy lol. Everything in the universe spins, and things that dont spin, simply dont exist. Anyway, dark matter is just pure nonsense, as are invented forces like the 'strong' and 'weak' force. Singularities explain how gravity alone can hold the atom nuclei together. They add fictional variables instead of revising the model.
Considering we have no complete understanding of inflation, dark matter, dark energy, or gravity for that matter (pardon the pun), how is such a model devised? Based purely on observation?
Well, apart from the epistemological problem that we don't really have a complete understanding of anything yet (wikipedia -> unsolved problems) the model is concocted using the usual scientific method: observations inspire formal representations or mathematical models (general relativity) which produce predictions which need to be refined due to new observations (accelerated expansion of universe) which feed back into the formal framework (inflation, dark energy/matter) which...
good video, I am interested how it works (math, etc... ) but unfortunatelly I am not familiar with math and probably there si a lot of complicated equations, etc.. ;)
"it has nothing to do with probability" , i like that statement
brianmenendez 2 months ago in playlist string theory
great stimulation. i just wish you put audio about that.
lovelplants 3 months ago
im trying to recreate this effect in autodesk maya. do you have any tips? im wondering if I can form this pattern with a texture
Omegaroth 4 months ago
Does this simulation account for the speed of ligiht?
Actually... I couldn't think of an even remotely plausible way to simulate that...
oEQjet 6 months ago
@oEQjet
Yes. Yes it does. All cosmological calculation depends upon the speed of light. If it wasn't known, none of this could be calculated.
taicleis 5 months ago
Probably it would be better, if description of this "demonstration" would be called simulation of expansion of universe.
And people, who wrote about dark matter, quantum rubbish - grow up, this is just a model and must say the idea is brilliantly simple and beautiful. The box is actually expanding universe(and it is not obvious to those who wrote comments, and also who didn't follow link) and represents how universe would expand in future(I assume current time there is just Z=1 or less).
easgair 1 year ago
@easgair current time is z=0. ANd this is NOT a simulation of how the universe expands. It probably takes expansion into account, but it's about structure's grow
supergiuovane 1 year ago
@supergiuovane
Right. The frame of reference is "co-moving" so the "camera" expands along with the universe. Therefore, one cannot see expansion occurring in the video.
DNAunion 1 year ago
@easgair
No, the video "ignores" expansion and focusses on the growh the structure in the universe.
DNAunion 1 year ago
funny to read comments about Dark Matter from 1-2 years ago, when new discoveries happen so often. See BBC News for "A space telescope has accidentally spotted thunderstorms on Earth producing beams of antimatter."
schriss2000 1 year ago
What does the Z represent?
STROKERACE9O 1 year ago
@STROKERACE9O z is the redshift. it provides a universal clock and can be used as a measure of time...
jNode 1 year ago
see w w w . astro. ucla. edu / ~wright / doppler. htm
jNode 1 year ago
see wikipedia Redshift Observations_in_astronomy
jNode 1 year ago
@jNode Redshift of the initial light from the "big bang"? An other question that might sound stupid, does the distribution of mass begin as homogenous? If so why would one particle move to one direction and not to an other?
Awesome video thanks.
goliathlup1 9 months ago
@goliathlup1 actually, the redshift of the light observed from distant objects which can be equated with an age of the universe (e.g., z = 8.6, corresponds to 600 million years after the big bang singularity, says wikipedia)...
jNode 8 months ago
@goliathlup1 ...not at all:-) only after ~400k years the universe became transparent and light started to travel (after being opaque, see decoupling in physical cosmology). this is also when the cosmic microwave background radiation was produced, which is observe today. the inhomogeneous distribution of this afterglow acted as the seeds for structure formation and are thought to have arisen from thermal variations generated by quantum fluctuations at early stages in the cosmic evolution.
jNode 8 months ago
@goliathlup1 indeed, the very early universe is thought to have been homogeneous and isotropic. for an interesting account of the stuff believed to have happened in the beginning, see steven weinberg's "the first three minutes".
jNode 8 months ago
@jNode Thanks, will do.
goliathlup1 8 months ago
the scientists have not yet explained why the "big bang" blew up the way it did. sped up then slowed down then sped up. my video presents the case against this commonly held "yo yo" theory of cosmic expansion
seethelightofgod 1 year ago
@seethelightofgod
They have explained those things. For example, expansion began to speed up about 5 billion years ago because dark energy came to dominate over matter. As the universe expands, the density of matter decreases; but the density of dark energy remains constant. So while the densiy of matter dominated dark energy early on, dark energy came to dominate over matter, causing expansion to accelerate.
DNAunion 1 year ago
the scientists have not yet explained why the "big bang" blew up the way it did. sped up then slowed down then sped up. my video presents the case against this commonly held "yo yo" theory of cosmic expansion
seethelightofgod 1 year ago
Cold Dark Matter is what scientists like to call a *fudge factor* to bring equations into equilibrium.
Without it, it is impossible to account for the structure of the observed universe.
Of course, we've never seen it, felt it, detected it, analyzed it, tested it, etc.. etc.. etc.. yet we know it must be there because there is no other possible way to arrive at the observed structure of the universe without it, unless you believe the ridiculous electric universe theory of course.
suedeslounge 3 years ago
of course!!!..thank you Captain Obvious
kronknroll 3 years ago 2
A string theorist has suggested that dark matter could be masses in the other dimensions. As you know, in string theory, gravitons are the only particles allowed to travel between dimensions. What do you think of that?
toddlerchar 3 years ago
lacking guidance from experimental feedback, theories of quantum gravity are elegant formal contraptions but highly speculative. applying such theories devised at a micro-level to cosmology doesn't make things better. and next to dark matter, there is still all that dark energy to account for...
data from the LHC validating/falsifying supersymmetry, higher dimensions, etc. would help. but i'm expecting the LHC to not even come up with a physical Higgs boson...
jNode 3 years ago
If you correct the Newtonian gravitational force by multiplying it by a cosine with a wavelength on the scale of a typical galaxy, you can see how ring galaxies form. That's a quantum-based correction that considers the graviton as carrying a gravity force vector rotating analogously to the E and M vectors of the photon, but much slower, consistent with the low energy that gravitational quanta must posess if they exist.
CACBCCCU 2 years ago
@toddlerchar Very good idea!
zvast 2 years ago
There is. Check out Nassim Haramein. Current physics are obviously wrong because they ignore spin, no wonder scientists miss like 99% of the needed mass and energy lol. Everything in the universe spins, and things that dont spin, simply dont exist. Anyway, dark matter is just pure nonsense, as are invented forces like the 'strong' and 'weak' force. Singularities explain how gravity alone can hold the atom nuclei together. They add fictional variables instead of revising the model.
GLaDOSrev2 2 years ago
not neceassary there adding of energy could be off and there is lot of energy and gravity they may not know of
tomanyasses 2 years ago
Considering we have no complete understanding of inflation, dark matter, dark energy, or gravity for that matter (pardon the pun), how is such a model devised? Based purely on observation?
dubaipete 3 years ago
Well, apart from the epistemological problem that we don't really have a complete understanding of anything yet (wikipedia -> unsolved problems) the model is concocted using the usual scientific method: observations inspire formal representations or mathematical models (general relativity) which produce predictions which need to be refined due to new observations (accelerated expansion of universe) which feed back into the formal framework (inflation, dark energy/matter) which...
jNode 3 years ago
...are again tested (WMAP). From this formal system of explanation, a computer simulation can be derived. Et voila...
jNode 3 years ago
Is this also how life can seem, right down to the subatomic scale?
goread41 4 years ago
Thank you for sharing! That was awesome :)
Gourmay 4 years ago
well actually this has got nothing to do with me (see the credits in the "about this video" section for the authors).
i found the simulation a year ago and thought it was a pity that it was not on youtube...
jNode 4 years ago
I know, but without you, I would have probably never seen it !
Gourmay 4 years ago
good video, I am interested how it works (math, etc... ) but unfortunatelly I am not familiar with math and probably there si a lot of complicated equations, etc.. ;)
deathbef 4 years ago
actually it is a simulation using a few simple assumptions (cold dark matter model):
consult the description of the video for the link to the project...
j
jNode 4 years ago