The Starmaker
2018-04-04 06:42:10 UTC
I'm a layman and I'm curious to understand how mass affects the expansion of space and whether the expansion of space is uniform everywhere in the universe.
From looking at redshifts it seems we have determined that until 5 billion years ago the expansion was slowing down and since then it has been speeding up. Supposedly the average density of mass in the universe is affecting the expansion - is this just conjecture and the only theory we have or is there some solid evidence for thinking this?
Wikipedia says "the scale of space itself changes" but that the model is valid only on large scales (galaxy clusters and above) and that the expansion cannot be observed on a smaller scale. wikipedia Is it possible that space between say, planet Earth and the Sun is actually expanding but is currently unobservable. If not, how far from our local group of galaxies do we have to look before we encounter some space that is actually expanding.
I realise that we don't understand what dark energy is and I much prefer answers that say "we don't know" if we really don't know.
Based on observation...From looking at redshifts it seems we have determined that until 5 billion years ago the expansion was slowing down and since then it has been speeding up. Supposedly the average density of mass in the universe is affecting the expansion - is this just conjecture and the only theory we have or is there some solid evidence for thinking this?
Wikipedia says "the scale of space itself changes" but that the model is valid only on large scales (galaxy clusters and above) and that the expansion cannot be observed on a smaller scale. wikipedia Is it possible that space between say, planet Earth and the Sun is actually expanding but is currently unobservable. If not, how far from our local group of galaxies do we have to look before we encounter some space that is actually expanding.
I realise that we don't understand what dark energy is and I much prefer answers that say "we don't know" if we really don't know.
mass affect the expansion of the universe, but not uniform because mass gets caught up in galaxies and solar systems.
like punching your way out of a paper bag...
Based on my observation...this photo shows the history before the big bang.
Loading Image...
Before the big bang occured, or the cause of the big bang..was
the steady state universe existed before the big bang.
Based on my observation..
during the steady state universe stars didn't die
and new stars were born
(galaxies didn't exist then either)
It got to a point that there were to many stars
occupying what little space there was..
to the point that stars got close to each other..
they began to meld...with each other..
to a point of
forming mass.
The steady state universe turn into one
giant boulder of hot stars and rock was formed
so that you got this giant hot bolder made from stars
that exploded and made more...space.
During the explosion some rocks when this way and other rocks when that way.
You can probably guess the rest...