Our galaxies are moving away due to science theory of black mater or black energy is expanding our universe

Question

So explain to me how if after the big bang our universe started expaning due to this black mater or energy it takes millions of yrs just for the radiaton to cool and millions of more yrs for stars and galaxies to form . wouldnt the expansion be too far to have any affect on our galaxies and is it not possible some other forces are moving our galaxies and not the expansion our universe is larger than we can comprehend and i feel its almost unlikely its having any affect on our galaxies also they say our universe is about 13.7 billion yrs old due to thats where we see the last of galaxies and start seeing radiation could there be more beyond the radiation and couldnt the radation cont for billions of yrs making our universe older than we know

Answer 1

Have you ever heard of something called punctuation, by any chance? Periods, commas and so on do not cost much and make it so much easier to read...

First, there is no way we can see beyond 13.7 billion light years, as the photons from beyond there (if there is a beyond) by definition did not have the time to get here yet.

Dark matter is conjectured because galaxies behave as if they were several times more massive than what we can observe (and we can observe visible matter--and visible matter, oddly enough, includes such things as black holes and opaque dust clouds; in physics it is a matter of not seeing, but of being able to see, and black holes are made of visible matter, even if we cannot see it).

However, the fact that very distance galaxies seems to be speeding away seem to indicate that there is another thing at play, and dark energy is thus proposed. It is an energy that is repulsive in nature, causing objects to expand, eventually reaching a point where even atoms would also be expanded and would rip apart in the distant future.

At this point in time, it is not really strong (or to be more accurate, its effect is not really strong).

Since the universe did not come with a "user's guide" scientists have to derive all that we know from what we can observe or expriment with. As to the objective nature of dark energy, we do not know enough yet to have any definitive conclusion.

Answer 2

"Our galaxies are moving away due to science theory..."

No.

Galaxies are moving away from each other.  That is an observation.  This is what we see.

The "science theory"  is an attempt to explain why they are moving away.  The best explanation so far is that space itself is expanding.  The distant galaxies are not moving at breakneck speeds.  As far as an observer on on of these galaxies is concerned (if that observer exists), he is stopped and we are the ones moving away.

In reality, no one is moving.  It is the amount of space (therefore the distance) that keeps increasing.

Many explanations were tried.  Some even made it to the level of "theories" (which, in science, means a very well structured set of rules and equations, that can be verified).

The two most popular with scientists (because they explained a lot of observations) were called "Steady State" and "Big Bang".

Steady State made the supposition that the universe had always existed (it was eternal).  Big Bang made the supposition that the universe did have a beginning (the Primordial Atom hypothesis).

Today, scientists agree that Big Bang is better at explaining what we see.  Based on the rules and equations (and our knowledge in many branches of science, like physics and chemistry), we estimate an age of 13.7 billion years.

Could it be much older?  Who knows.  But anyone who wants to create a theory that calls for an older universe must also make sure that the new theory will explain what we see, even better then the theory called Big Bang.

Theories can always be replaced with even better theories.  However, the new one MUST turn out better than the old one; it cannot ignore what we can already observe.

The dark energy comes in as an attempt to explain this newly observed effect:  the speed of the expansion of space is increasing.

All our understanding of science tells us that if all the energy of the expansion came from the Bib Bang at the beginning, then the expansion would be slowing down by now.  It is not.

Obviously, something is causing it to go faster instead of slower.  We do not know. So, for now, we call it "Dark Energy" (where the word "dark" simply means "unknown" -- as in: we can't see what it is).