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Presumably in a universe that is universally expanding in every direction, the observation point that we observe these observations from must also be expanding away from everywhere else..
Quote from: timey on 27/03/2017 22:11:17Presumably in a universe that is universally expanding in every direction, the observation point that we observe these observations from must also be expanding away from everywhere else..I answered this the other day but the post disappeared in the upgrade.By an odd coincidence I used the same eg as Alan in another thread on time. Take a rubber band and mark a series of dots on it. Then stretch the band, you will see that they move apart and if you look at any dot you will see that it will view all the other dots as moving away from it. You can do the same with a rubber sheet (a plane) or a volume.This is just a natural effect of the expansion of surfaces and volumes.
A star that is observed from one part of the universe as moving faster, and from another part of the universe as moving slower, cannot be moving both faster and slower.
Quote from: timey on 29/03/2017 16:49:32How would you know what the velocity of the galaxy was initially if the velocity has been slowed by time dilation?And if you cannot know the initial velocity then how can you calculate a percentage of the speed of light in order to ascertain the time dilation effect?Therefore, how can you calculated a time dilation effect that is caused by a velocity, if the time dilation effect slows the velocity. That is a catch 22.Yes, it's a tricky one to answer...
How would you know what the velocity of the galaxy was initially if the velocity has been slowed by time dilation?And if you cannot know the initial velocity then how can you calculate a percentage of the speed of light in order to ascertain the time dilation effect?Therefore, how can you calculated a time dilation effect that is caused by a velocity, if the time dilation effect slows the velocity. That is a catch 22.
The problem is negated in my cyclic model. The 3rd time dilation causes a temporal curvature as well as giving physical cause for acceleration of gravity.SR is then just an experience for the traveller, as opposed to an observation of the travelers motion for the observer.
There is no reason for expansion or contraction of the universe. GR dilation and potentially SR rotation is all that is needed to view all galaxies as red shifted from our perspective in the outer regions of our own galaxy. We are in a less dilated position then 75% of the light created in all other galaxies. GR relativity is consistent with all galaxies relatively red shifted. Even Andromeda is red shifted from our position. The only way we know of the eminent collision is the arm moving towards us is more shifted that the arm moving away. Logic should reign over the collective scientific mind but it does not.
Timey #6QuoteA star that is observed from one part of the universe as moving faster, and from another part of the universe as moving slower, cannot be moving both faster and slower.My 1st reply was inadequate. My point is, it's not the physical behavior of the star having 2 contradictory states, but the differing perceptions of an observer 'here' and an observer 'there'.My simple analogy: a cloud of water vapor on a sunny day. Each observer sees their own personal rainbow.
Quote from: GoC on 30/03/2017 17:44:46There is no reason for expansion or contraction of the universe. GR dilation and potentially SR rotation is all that is needed to view all galaxies as red shifted from our perspective in the outer regions of our own galaxy. We are in a less dilated position then 75% of the light created in all other galaxies. GR relativity is consistent with all galaxies relatively red shifted. Even Andromeda is red shifted from our position. The only way we know of the eminent collision is the arm moving towards us is more shifted that the arm moving away. Logic should reign over the collective scientific mind but it does not. How can you be so wrong and so confident?
:wikiThe expression on the left represents the curvature of spacetime as determined by the metric; the expression on the right represents the matter/energy content of spacetime. The EFE can then be interpreted as a set of equations dictating how matter/energy determines the curvature of spacetime.
Chris - I watched a Horizon program on Dark Energy last year where physicists were saying in light of Dark Energy remaining a complete mystery, that perhaps a new approach is required...Among those physicists was George Efstathiou from Cambridge University.Do you know him?