Some questions I have about the universe...?

[Neogaia777]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

What is the relation and distance and motion to time...?

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?

If someone could help me with this/these, I would greatly appreciate it,

Much thanks in advance.

Comments...?

God Bless!

 

[John Hyperspace]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

Depends on the theory. The status quo is usually a form of inflation/expansion theory and the distance between galaxies is variable depending on which galaxies you're calculating the distance between.

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

Depends on the theory; but generally the answer is, yes. What you see is what was x years ago where x=distance in light years which assumes a constant, c=speed of light.

What is the relation and distance and motion to time...?

s=d/t, t=d/s, d=st where s=speed, d=distance, t=time

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Depends on the theory.

Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?

If someone could help me with this/these, I would greatly appreciate it,

Much thanks in advance.

Comments...?

God Bless!

They all depend on what theory you're going by. A lot of astronomers dispute z (recession/acceleration velocity: some even dispute that z isn't a velocity indicator at all), G (gravitational constant): the Hubble constant; all of which yield different conclusions. It's all speculative conjecture. When you start getting into plasma physics, electric/plasma dynamo, and their offspring theories; everything changes radically.

 

[Neogaia777]

Depends on the theory. The status quo is usually a form of inflation/expansion theory and the distance between galaxies is variable depending on which galaxies you're calculating the distance between.



Depends on the theory; but generally the answer is, yes. What you see is what was x years ago where x=distance in light years which assumes a constant, c=speed of light.



s=d/t, t=d/s, d=st where s=speed, d=distance, t=time



Depends on the theory.



They all depend on what theory you're going by. A lot of astronomers dispute z (recession/acceleration velocity: some even dispute that z isn't a velocity indicator at all), G (gravitational constant): the Hubble constant; all of which yield different conclusions. It's all speculative conjecture. When you start getting into plasma physics, electric/plasma dynamo, and their offspring theories; everything changes radically.

Thanks for doing your best to answer, I appreciate it...

About speed and time, is it as Einstein says that the closer you get to the speed of light, time slows down or even stops at the speed of light...?

Much thanks,

God Bless!

 

[4x4toy]

I thought the universe was accelerating in expansion
Psalms 104:2 God stretched them out and is stretching them out .. But given that a black hole gravitation force is to strong to allow light to escape , how could any thing escape supposed all matter concentrated in the size of a period ?

 

[Widlast]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

It's not that simple, there is an awful lot out there. If I remember right (this is off the top of my head) the Magellenic Clouds are 17 million light years away and Andromeda is 21 million or so. A light year being 5.8 trillion miles (roughly).

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

Yes. If it is 1 light year away it takes 1 year for the light to get here. So, 200 light years, 200 years.

What is the relation and distance and motion to time...?

? Please be more plain in your question.

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Depends on who you ask. Apparently it will expand forever. (subject to the will of God).

Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?

Gravity is the cause/result of all the behaviors you see in the universe.

If someone could help me with this/these, I would greatly appreciate it,

Much thanks in advance.

Comments...?

God Bless![/QUOTE]

 

[John Hyperspace]

Thanks for doing your best to answer, I appreciate it...

About speed and time, is it as Einstein says that the closer you get to the speed of light, time slows down or even stops at the speed of light...?

Much thanks,

God Bless!

According to the theory of relativity c is always a constant, so no matter how fast you go, you will always measure c as the same speed; so the theory proposes time is variable and changes accordingly.

 

[SkyWriting]

I wonder if someone would humor me and answer some questions I have about the universe...?
How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?
Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...
What is the relation and distance and motion to time...?
Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...
Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?
If someone could help me with this/these, I would greatly appreciate it,
Much thanks in advance.
Comments...?
God Bless!

People make educated guesses. Others consider what they published and conduct their own research which agrees with the first published, or it comes to a different conclusion.

Only a few years ago scientists examined the "darkest" part of the sky they could find with nothing much showing as visible light. Instead of void...they found this:

On to another issue.

It was assumed that space expansion would slow, then implode again over and over.
Further number crunching by others determined that expansion was equal to gravity forces so the expansion would slow then dwindle at a slowing pace forever.

Further number crunching by others determined that expansions was actually increasing in speed. Like an opposite gravity effect. This was deemed "Dark Energy" becasue it doesn't match the visible stars we see.

Magnifying the Universe
Magnifying the Universe

 

[Michael]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

It depends on whether we're talking about a galaxy that's a part of our local galaxy cluster, or we're talking about a galaxy that is located in a distant galaxy cluster. Even the closest galaxies to our own are quite distant. Andromeda is 2.5 million light years away. The most distant ones can be many billions of light years away.

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

Yes. We're seeing light from our closest stellar neighbors that was first emitted by the star several years ago. Light reaching us today from Andromeda left that galaxy about 2.5 million years ago. Light reaching us from distant galaxies took over 10 billion years to reach us in some cases.

What is the relation and distance and motion to time...?

That ultimately depends on the specific cosmology model, and how you chose to interpret 'redshift'

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Personally I think it's static, and it's unlikely to go anywhere anytime soon.

LCDM theory (big bang theory) presumes that photon redshift is caused by 'space expansion' and the dark energy claims would suggest that the universe in that cosmology model will continue to expand, and stars will eventually fizzle out.

Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?

They *used* to believe that gravity would cause the expansion process to "slow down" over time due to the pull of gravity. A while back they did a study on SN1A events and introduced something called "dark energy" which they claim causes the space expansion process to 'accelerate' over time.

 

[Neogaia777]

According to the theory of relativity c is always a constant, so no matter how fast you go, you will always measure c as the same speed; so the theory proposes time is variable and changes accordingly.

Doe That make time travel plausible...? If you could go fast enough...?

Thanks again,

God Bless!

 

[Neogaia777]

Yes. If it is 1 light year away it takes 1 year for the light to get here. So, 200 light years, 200 years.


? Please be more plain in your question.

Depends on who you ask. Apparently it will expand forever. (subject to the will of God).


Gravity is the cause/result of all the behaviors you see in the universe.

If someone could help me with this/these, I would greatly appreciate it,

Much thanks in advance.

Comments...?

God Bless!

People make educated guesses. Others consider what they published and conduct their own research which agrees with the first published, or it comes to a different conclusion.

Only a few years ago scientists examined the "darkest" part of the sky they could find with nothing much showing as visible light. Instead of void...they found this:

On to another issue.

It was assumed that space expansion would slow, then implode again over and over.
Further number crunching by others determined that expansion was equal to gravity forces so the expansion would slow then dwindle at a slowing pace forever.

Further number crunching by others determined that expansions was actually increasing in speed. Like an opposite gravity effect. This was deemed "Dark Energy" becasue it doesn't match the visible stars we see.

Magnifying the Universe
Magnifying the Universe

It depends on whether we're talking about a galaxy that's a part of our local galaxy cluster, or we're talking about a galaxy that is located in a distant galaxy cluster. Even the closest galaxies to our own are quite distant. Andromeda is 2.5 million light years away. The most distant ones can be many billions of light years away.



Yes. We're seeing light from our closest stellar neighbors that was first emitted by the star several years ago. Light reaching us today from Andromeda left that galaxy about 2.5 million years go. Light reaching us from distant galaxies took over 10 billion years to reach us in some cases.



That ultimately depends on the specific cosmology model, and how you chose to interpret 'redshift'



Personally I think it's static, and it's unlikely to go anywhere anytime soon.

LCDM theory (big bang theory) presumes that photon redshift is caused by 'space expansion' and the dark energy claims would suggest that the universe in that cosmology model will continue to expand, and stars will eventually fizzle out.



They *used* to believe that gravity would cause the expansion process to "slow down" over time due to the pull of gravity. A while back they did a study on SN1A events and introduced something called "dark energy" which they claim causes the space expansion process to 'accelerate' over time.

Thanks guys, I appreciate it...

Sounds like nobody is really quite "sure" yet though, could any of you possibly tell me a few things about this/these that we can be sure of, and maybe what we can't or aren't right now...?

Thanks in advance,

God Bless!

 

[Adstar]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

Varies quite a bit.. Some galaxies are currently in the process of colliding so Zero space in those cases.. Others vary from very close to thousands of light years.. Generally the average star system distance is shorter then the average galaxy distance..

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

If a star is 4 light years away the image you are looking at is 4 years old. If you are looking at a start 10,000 light years away you are seeing it as it was 10,000 years ago.. If that star exploded today humanity would not see it explode for another 10,000 years

What is the relation and distance and motion to time...?

Sorry but i do not understand the question..

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Yes the universe is expanding and from measurements it is expanding at an accelerating rate.. An explosion cannot cause an accelerating expansion .. The expansion rate would be decelerating if it was caused by an explosion because the gravity generated by the mass of the universe would act as a brake to the rate of expansion..

Or will or does, what effect does gravity and gravitational pull have on the expansion or motion of stars/galaxies, what effect does gravity and gravitational pull of everything have on the expansion and motion of the universe...?

Well gravity should be working to decelerate the universes expansion.. But it isn't..

 

[SkyWriting]

Well gravity should be working to decelerate the universes expansion.. But it isn't..

Unless the calculations are wrong...again.
So far, they've been wrong 100% of the time.

 

[Michael]

Doe That make time travel plausible...? If you could go fast enough...?

Thanks again,

God Bless!

Time only seems to travel in one direction. Since nothing can travel faster than light, it's not really possible to go 'backwards' in time. According to GR theory however, the passage to time is related to the speed of the object. From the perspective of a person traveling at the speed of light toward a different star, almost no time will have passed for them over their journey, whereas everyone living on Earth would be many years older by the time he/she arrived at the distant star.

 

[John Hyperspace]

Doe That make time travel plausible...? If you could go fast enough...?

Thanks again,

God Bless!

If you could go fast enough, and circumvent the problem of attaining infinite mass/energy; I suppose it would work in theory.

 

[Adstar]

Unless the calculations are wrong...again.
So far, they've been wrong 100% of the time.

Well i agree.. Humans do not have total situational awareness of the entirety of the universe so miscalculations are part and parcel of that reality..

 

[Michael]

What is the Closest Galaxy to the Milky Way? - Universe Today

FYI, there are stellar formations called "satellite" galaxies that are closer than Andromeda.

 

[Widlast]

Thanks guys, I appreciate it...

Sounds like nobody is really quite "sure" yet though, could any of you possibly tell me a few things about this/these that we can be sure of, and maybe what we can't or aren't right now...?

Thanks in advance,

God Bless!

The replies were plain enough. What still confuses you?

 

[Neogaia777]

The replies were plain enough. What still confuses you?

Not confuses me, just that to certain things still seem to be the answer, "We do not know for sure yet"...

God Bless!

 

[Neogaia777]

What is the diameter of our galaxy?

What is the diameter of the largest galaxy we know of? The smallest?

How far away is the nearest galaxy in relation to ours? The furtherest one away that we know of?

Do we know how large the universe is?

I'm trying to get a mental picture here...?

If we are viewing say, galaxies hundreds of billions, or trillions, of light years away, then, aren't we seeing them at hundreds of billions or trillions of years old, or earlier...

They could have fizzled out and died by now, or not even be in the/that same position, for all we know, couldn't they, if were seeing them as hundreds of billions of trillions of light years away, couldn't they?

What about a supernova of a star, say 200 light years away, do we not know it, until two hundred years later?

Some help would be greatly appreciated, thanks in advance,

God Bless!

 

[lesliedellow]

I wonder if someone would humor me and answer some questions I have about the universe...?

How much space is there between galaxies? Are they far apart like star systems are in galaxies, or not so much?

There is no fixed distance between galaxies. Andromeda is the closest to our own, and it is 2.5 million light years away.

Are the images our telescopes see of distant astronomical phenomena, that are light years away, as old as the distance in their being light years away is...? Like a star 4 light years away... Is what were seeing of it 4 years old...? Are seeing other galaxies this way, if they are...

If something is a light year away, what we are seeing is that something as it was a year ago. It is possible that it might not be there now.

Is the universe really expanding, like an explosion is or does, and will it slow down and fizzle out like and explosion does, in time...

Yes the universe is expanding. It was previously assumed that gravity would be slowing down the rate of expansion, but it turns out that it is actually accelerating, and nobody is quite sure why, although it has been christened dark energy.