Expanding space, accelerating Universe?
16th February 2015
Expanding space, accelerating Universe?
Private & Confidential Copyright © Mr A Pépés
I read a couple of days ago a few comments where someone was saying that an accelerating Universe was the same as expanding space with reference to dark matter and Galaxies. Unfortunately this is not the case if the accelerating expansion is not uniform, as is the case with my model. Space not only expands globally (not uniformly on a detailed level) but contracts locally around centres of mass.
At the centre of the Galaxy you expect more Dark matter and the expansion is less at its centre. The mechanism is the same as normal gravity where dark energy is more compressed on average at the centre of mass and less compressed at a distance away from mass. The flow of dark energy is two way, more dense dark energy falls inwards towards the centre of mass and less dense dark energy flows outwards away from the centre of mass. This is the cause of the curvature of the gravity well, the Galactic gravity well is just the net effect of all the gravity wells of each star plus the gravity well of the dark matter at the centre of the Galaxy. It is the dark energy that is pushing the Galaxies apart and it is the matter that is creating this density gradient that forces the galaxies apart.
As an illustration of this effect, imagine that the mass of a star is represented by a small piece of sponge and that dark energy is represented by water. Water is absorbed by the sponges (stars) pulling them together (the gravity), but at the same time the sponges are being squeezed (squashed together) by the mass of the sponge, and there is a larger sponge of dark matter at the centre of the Galaxy. This overall effect squeezes the water out of the sponges and away from the centre of the Galaxies forcing the expansion of space away from the galaxies. As the expansion is taking place away from the centre, it is still contracting locally around the outer stars, but contracting less than at the centre.
Morph your mind with Morphological at
apepes.com
Expanding space, accelerating Universe?
Private & Confidential Copyright © Mr A Pépés
I read a couple of days ago a few comments where someone was saying that an accelerating Universe was the same as expanding space with reference to dark matter and Galaxies. Unfortunately this is not the case if the accelerating expansion is not uniform, as is the case with my model. Space not only expands globally (not uniformly on a detailed level) but contracts locally around centres of mass.
At the centre of the Galaxy you expect more Dark matter and the expansion is less at its centre. The mechanism is the same as normal gravity where dark energy is more compressed on average at the centre of mass and less compressed at a distance away from mass. The flow of dark energy is two way, more dense dark energy falls inwards towards the centre of mass and less dense dark energy flows outwards away from the centre of mass. This is the cause of the curvature of the gravity well, the Galactic gravity well is just the net effect of all the gravity wells of each star plus the gravity well of the dark matter at the centre of the Galaxy. It is the dark energy that is pushing the Galaxies apart and it is the matter that is creating this density gradient that forces the galaxies apart.
As an illustration of this effect, imagine that the mass of a star is represented by a small piece of sponge and that dark energy is represented by water. Water is absorbed by the sponges (stars) pulling them together (the gravity), but at the same time the sponges are being squeezed (squashed together) by the mass of the sponge, and there is a larger sponge of dark matter at the centre of the Galaxy. This overall effect squeezes the water out of the sponges and away from the centre of the Galaxies forcing the expansion of space away from the galaxies. As the expansion is taking place away from the centre, it is still contracting locally around the outer stars, but contracting less than at the centre.
Morph your mind with Morphological at
apepes.com
