Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: pranza on 11/11/2010 06:09:36
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Hello all,
I have been doing a lot of research on Dark Matter and the affects that Dark Radiation could play a role in the energy that is suspected of speeding the universe's expansion. It seems relevant that the dark radiation was caused by a fast projected photon of mass or light in the first stage. I know the radiation is dark but this energy was derived from a blast or units with light first. Once turned to dark radiation it's forces refuse to emit or interact with light in a way. Does this play a key role in the dark matter speeding up the universe's expansion?
[???] [:-\] [???]
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On the peripheral extremes of our universe is where you will probably find the most dark matter. Even with the vast distances and dispersal of this material its mass is greater than the entire contents of our universe and it's attractive gravitational force would explain the fact that our galaxies are moving faster away from the centre of our universe. The key here is that gravitational force extends a lot farther beyond the limits of our own universe and that our universe is subject to gravitational forces originating way beyond what we could possible conceive as the limits of our universe. Sorry about the repetition.
Parts of the contents of our universe specifically the galaxies are much older than the initial big bang event. Hard to imagine but would explain the vast differences in there sizes.
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Pranza You are probably thinking incorrectly. The "big bang" is most definitely NOT an explosion being pushed apart by a violent event in the past. This was a name given to it by the group who opposed the idea and might even have been deliberately chosen to mislead and confuse. But it stuck! The expansion of our universe is very smooth and turbulence free indeed as the cosmic microwave background shows.
Our universe is currently thought to be built of four main components matter, energy, dark matter and dark energy, It is currently thought that this latter element is the greatest.
Ordinary matter and energy are things that can be observed and measured particles, stars, galaxies, light and even gravitational waves. Dark matter can be "observed" and measured by assuming that gravitation works normally at all dimensions including the scale of galaxies and clusters of galaxies. Dark energy is "observed" by measuring precisely the expansion of the universe and balancing the total energy budget of the universe to produce a "flat" space time geometry. Dark energy drives the expansion of space NOT by an explosion but by effectively creating more space between things. However this is only significant over very large distances.
The simplest way of thinking of what happens is that there is something in dark matter and dark energy which both may consist of several different sorts of as yet unobserved particles or radiation which in effect interact to create more "particles" of space.
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Makes a lot of sense, I really appreciate that! [:)]