Davor
Jun28-04, 08:50 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>A few ideas clicked into place for me a little while ago while I was\nhaving lunch and reading a book (Alastair Reynolds\' Absolution Gap pg\n334). It has to do with extra dimensions, dark matter and energy and\nwhy gravity doesn\'t fit current Theory of Everythings (except String\nTheory, which is why I am posting here).\n\nLocal galaxies have been observed where stars in the outer edges of\nthose galaxies are rotating faster around the galaxy then they ought\nto be, as theory would account for given the estimated mass of the\nuniverse. And not just a bit faster but a lot faster.\nAstrophysicists add Dark Matter to the equation to account for this\nextra speed. Basically saying that if there was extra mass then\ntheory could account for the speed of those stars. But they cannot\nsee the mass, hence the term Dark Matter, matter that doesn\'t interact\nwith ordinary matter.\n\nThis is where extra dimensions come into the picture, because Dark\nMatter exists in these dimensions, but not our own. The only way we\ncan interact with Dark Matter is gravitationally. The reason that the\nmatter we are made of cannot interact with Dark Matter is that the\nforces that make us up are confined to our set of dimensions, where\nthe forces that make up Dark Matter are confined to another set of\ndimensions (and have different characteristics, more on this later).\nBut gravity, which puzzled scientists by being billions of times\nweaker in comparison to say, the electromagnetic force, gravity\noperates in all the dimensions, it only appears weak to us when\ncompared to the confined forces. One operates in all 10 or 11\ndimensions (I forget which) while the others operate in only 4, the\nfamiliar length, width, breadth and time. Of course its weaker, for\nevery unit of distance it travels its being spread across many more\ndimensions.\n\nSo how do we know that Dark Matter is in dimensions other then our\nown? Models of the mass distribution necessary to account for the\nobserved galatic revolutions have been made. They show a diffuse mass\naround and through the galaxy. Since regular matter and Dark Matter\ninteract gravitationally, its expected that they would be attracted.\nBut the fact that the Dark Matter is diffuse and spread out, points at\ndifferent physical laws governing its interactions with itself. Some\nforce or forces we can only imagine are preventing this Dark Matter\nfrom collapsing into dense conglomerations like our suns and planets.\nWe see an indication of this in the fact that the planets in our solar\nsystem are orbiting the sun in a fashion perfectly accounted for by\ntheory. So Dark Matter is prevented somehow from condensing this far.\nThe forces operating in the Dark Matter dimensional framework are\ncounterparts of the familiar forces operating in ours, but they would\nhave to differ in some dramatic way as a consequence of having to work\nin those tightly curled dimensions.\n\nIt all seems to hang together. But tell me what I have gotten wrong,\nwhats obviously egregious.\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>A few ideas clicked into place for me a little while ago while I was
having lunch and reading a book (Alastair Reynolds' Absolution Gap pg
334). It has to do with extra dimensions, dark matter and energy and
why gravity doesn't fit current Theory of Everythings (except String
Theory, which is why I am posting here).
Local galaxies have been observed where stars in the outer edges of
those galaxies are rotating faster around the galaxy then they ought
to be, as theory would account for given the estimated mass of the
universe. And not just a bit faster but a lot faster.
Astrophysicists add Dark Matter to the equation to account for this
extra speed. Basically saying that if there was extra mass then
theory could account for the speed of those stars. But they cannot
see the mass, hence the term Dark Matter, matter that doesn't interact
with ordinary matter.
This is where extra dimensions come into the picture, because Dark
Matter exists in these dimensions, but not our own. The only way we
can interact with Dark Matter is gravitationally. The reason that the
matter we are made of cannot interact with Dark Matter is that the
forces that make us up are confined to our set of dimensions, where
the forces that make up Dark Matter are confined to another set of
dimensions (and have different characteristics, more on this later).
But gravity, which puzzled scientists by being billions of times
weaker in comparison to say, the electromagnetic force, gravity
operates in all the dimensions, it only appears weak to us when
compared to the confined forces. One operates in all 10 or 11
dimensions (I forget which) while the others operate in only 4, the
familiar length, width, breadth and time. Of course its weaker, for
every unit of distance it travels its being spread across many more
dimensions.
So how do we know that Dark Matter is in dimensions other then our
own? Models of the mass distribution necessary to account for the
observed galatic revolutions have been made. They show a diffuse mass
around and through the galaxy. Since regular matter and Dark Matter
interact gravitationally, its expected that they would be attracted.
But the fact that the Dark Matter is diffuse and spread out, points at
different physical laws governing its interactions with itself. Some
force or forces we can only imagine are preventing this Dark Matter
from collapsing into dense conglomerations like our suns and planets.
We see an indication of this in the fact that the planets in our solar
system are orbiting the sun in a fashion perfectly accounted for by
theory. So Dark Matter is prevented somehow from condensing this far.
The forces operating in the Dark Matter dimensional framework are
counterparts of the familiar forces operating in ours, but they would
have to differ in some dramatic way as a consequence of having to work
in those tightly curled dimensions.
It all seems to hang together. But tell me what I have gotten wrong,
whats obviously egregious.
having lunch and reading a book (Alastair Reynolds' Absolution Gap pg
334). It has to do with extra dimensions, dark matter and energy and
why gravity doesn't fit current Theory of Everythings (except String
Theory, which is why I am posting here).
Local galaxies have been observed where stars in the outer edges of
those galaxies are rotating faster around the galaxy then they ought
to be, as theory would account for given the estimated mass of the
universe. And not just a bit faster but a lot faster.
Astrophysicists add Dark Matter to the equation to account for this
extra speed. Basically saying that if there was extra mass then
theory could account for the speed of those stars. But they cannot
see the mass, hence the term Dark Matter, matter that doesn't interact
with ordinary matter.
This is where extra dimensions come into the picture, because Dark
Matter exists in these dimensions, but not our own. The only way we
can interact with Dark Matter is gravitationally. The reason that the
matter we are made of cannot interact with Dark Matter is that the
forces that make us up are confined to our set of dimensions, where
the forces that make up Dark Matter are confined to another set of
dimensions (and have different characteristics, more on this later).
But gravity, which puzzled scientists by being billions of times
weaker in comparison to say, the electromagnetic force, gravity
operates in all the dimensions, it only appears weak to us when
compared to the confined forces. One operates in all 10 or 11
dimensions (I forget which) while the others operate in only 4, the
familiar length, width, breadth and time. Of course its weaker, for
every unit of distance it travels its being spread across many more
dimensions.
So how do we know that Dark Matter is in dimensions other then our
own? Models of the mass distribution necessary to account for the
observed galatic revolutions have been made. They show a diffuse mass
around and through the galaxy. Since regular matter and Dark Matter
interact gravitationally, its expected that they would be attracted.
But the fact that the Dark Matter is diffuse and spread out, points at
different physical laws governing its interactions with itself. Some
force or forces we can only imagine are preventing this Dark Matter
from collapsing into dense conglomerations like our suns and planets.
We see an indication of this in the fact that the planets in our solar
system are orbiting the sun in a fashion perfectly accounted for by
theory. So Dark Matter is prevented somehow from condensing this far.
The forces operating in the Dark Matter dimensional framework are
counterparts of the familiar forces operating in ours, but they would
have to differ in some dramatic way as a consequence of having to work
in those tightly curled dimensions.
It all seems to hang together. But tell me what I have gotten wrong,
whats obviously egregious.