Naked Science Forum
On the Lighter Side => New Theories => Topic started by: timemachine on 06/03/2018 23:36:03
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Please state your questions or opinions on my following questions and share the logic that supports that opinion.
Is the universe the one and only or are there a set of universes ? (Hereafter, please consider the word universe(s) to mean one or a set of)
Is the universe(s), finite or infinite ?
Is everything that composes the universe(s) a form of energy of one density or another ?
If the universe(s) is finite then must be the total energy of the universe in all of its forms be fixed and finite ?
If the forms of energy in the universe(s) transform from one density to another does the volume of the universe relative to its most dense component increase and decrease ?
Could an increase in the volume perhaps due to an increase in the volume of energy in the form of space and thereby cause the galaxies to tend to move away from each other ?
If the volume of space in the universe(s) is increasing what other form of denser energy do you suspect might be somehow transforming into space ?
If the universe(s) is finite and bounded by its volume does that mean that even space ans electromagnetic energy are somehow cohesive what could possibly be outside of that volume ?
If the universe(s) is bounded by its volume what could possibly be outside of that volume ?
What additional questions do these questions bring to mind ?
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OKAY, I've got 10 views and zero replies, therefore I will answer my questions with my opinions in the hope that it will, at least, draw out comments by critics.
Q1. There is only one universe. Since the range of gravity supposedly has no end even though it diminishes by the square of the distance if there were more than one galaxy they would eventually mutually attract and become one. The notion of galaxies in different dimensions is pure imaginary hogwash. If not, let us see some real evidence.
Q2. Finite. If the universe Is all energy which is a real physical thing, find it illogical and more imaginary hogwash to think there can be an infinite quantity of something that is physically real.
Q3,4, 5, 6. All Yes
Q7. Black Holes.
Q8 & 9 are a goof up on my part as they are really the same question and the answer to both is "A void of zero energy". Further, zero energy can, more logically than real energy, be viewed as infinite since it is physically nothing.
Q10. Yep, another question. What causes the universe to be a single cohesive thing in which every part is physically connected. My answer is gravity or to get more mysterious "fields of one type or another". My logic stems from the implied evidence of quantum theory that describes "spooky action at a distance due to some kind of entanglement".
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Q1...if there were more than one galaxy ....
There is more than one galaxy!
Some of them are even visible with the naked eye, like Andromeda and the Large and Small Magellanic Clouds (the latter two are best viewed from the Southern Hemisphere).
The Hubble Ultra Deep Field photograph shows around 10,000 galaxies in one patch of sky.
https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field
Q1...if there were more than one galaxy they would eventually mutually attract.
All galaxies close enough to be visible (even via a telescope) are close enough to attract each other, since gravity has the same speed and same range as light.
Q1...if there were more than one galaxy they would eventually mutually attract and become one.
It is true that the Magellenic Clouds are already in orbit around our galaxy, and have probably been already disrupted by our galaxy.
https://en.wikipedia.org/wiki/Magellanic_Clouds
Andromeda happens to be heading in our direction, and will collide with our galaxy in about 4 billion years (about the same time that the Sun swallows the Earth). However, it will take billions of years for the two to merge into a regular structure, and in the process, many stars will be totally ejected from the new galaxy.
https://en.wikipedia.org/wiki/Andromeda%E2%80%93Milky_Way_collision
However, there is a thing called "Escape Velocity": If two galaxies are moving apart faster than their mutual escape velocity, then they will never collide, despite their mutual attraction.
Due to the accelerating expansion of the universe, many galaxies are already moving away from our galaxy faster than the escape velocity, so these galaxies will never merge with our galaxy (if present trends continue).
For current theories on the fate of the universe, see: https://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe
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Is the universe the one and only or are there a set of universes ? (Hereafter, please consider the word universe(s) to mean one or a set of)
The Universe is one, only poor semantics and definition makes a multi verse. Observable universes can be more than one , but they still exist has a part of the whole.
Is the universe(s), finite or infinite ?
Just consider observable finite universes in being a n-dimensional light sphere within an infinite space.
s everything that composes the universe(s) a form of energy of one density or another ?
Yes
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Hello evan_au, You are so very correct and I must have had a bit too much of that pesky fermented grape juice.
In my answer to Q1 I used the word galaxy when I intended to say universe as I did in the question. Please forgive.
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Hello Thebox, It seems to me that we might pretty much agree except for the following. Why would observable universes be seen as more than one if they are really part of the whole? Surely, being part of the whole makes just one universe! This means that I would replace your second statement with " Consider a finite universe as being a sphere of energies, including space energy, that varies in volume depending on the changing percentages of its different density energy forms within an infinite void of nothing".
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Why would observable universes be seen as more than one if they are really part of the whole?
Because by observable, that means as far as we can see, we can only see so far, so it does not matter where we are in an infinite space, we only ever see so far so deem it finite.
Now if you were in the non observable universe, you will have the same problem, so unless your sphere got closer to my sphere, we would never see each other.
Alternatively , imagine you have a candle and I have a candle at two opposite ends of a long tunnel.
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find it illogical and more imaginary hogwash to think there can be an infinite quantity of something that is physically real.
Why? Why would the total number of something have any effect on how "real" it is?
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Why? Why would the total number of something have any effect on how "real" it is?
Well, it would not necessarily. However, speaking from a philosophical perspective, I find it much easier to envision an absolute void of energy, excluding space which is a form of energy, extending infinitely. To extend a form of energy infinitely, of course, requires an unlimited existence of energy of one form or another and I find that much more difficult to place into a philosophical view of physics. When we get to these types of issues we automatically venture into the realm of philosophy more so than physics which is a science that is dependent upon measurement. Here, I might offer a philosophical description of our universe but I think I will, instead, post it as a separate new thread for you and others to comment. Regards
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Please state your questions or opinions on my following questions and share the logic that supports that opinion.
OK
Is the universe the one and only or are there a set of universes ? (Hereafter, please consider the word universe(s) to mean one or a set of)
There are multiple galaxies existing in the observable universe. The observable universe may have other dimensions that have not unfolded like space time 4 dimensions.
Is the universe(s), finite or infinite ?
Why should it be finite, would you define the edge at the limit of what you can observe.
Is everything that composes the universe(s) a form of energy of one density or another ?
All things are quantum fluctuations or excitations, quantum fluctuations exist everywhere even in the vacuum of space.
If the forms of energy in the universe(s) transform from one density to another does the volume of the universe relative to its most dense component increase and decrease ?
Forms of energy can transform from one kind to another, think nuclear explosion. Space time curvature can be viewed as being caused by the contraction of space around a mass. Galaxies are in general moving apart due to the expansion of space which is attributed to dark energy.
Could an increase in the volume perhaps due to an increase in the volume of energy in the form of space and thereby cause the galaxies to tend to move away from each other ?
This is caused by dark energy and the expansion of space between galaxies.
If the volume of space in the universe(s) is increasing what other form of denser energy do you suspect might be somehow transforming into space ?
All forces are transmitted by virtual particles of one form or another, these virtual particles are also known as quantum fluctuations. There is no point in space that does not have quantum fluctuations of one form or another, I SUSPECT that space contracts when quantum fluctuations are restricted and expands when they are not. Ligo detected expansion and contraction of space due to gravitational waves and a black hole merger.
If the universe(s) is finite and bounded by its volume does that mean that even space ans electromagnetic energy are somehow cohesive what could possibly be outside of that volume ?
I SUSPECT Space time does not exist without quantum fluctuations which are electromagnetic in nature. I also think that we will never be able to find an edge to the universe other than the observable universe, and can therefore be regarded as infinte ie a value that can never be attained..
If the universe(s) is bounded by its volume what could possibly be outside of that volume ?
If you cant detect the edge of the universe EVER why should the universe be bounded by a volume.
.What additional questions do these questions bring to mind ?
How many dimensions does space have and how are they interconnected throughout the universe and between individual particles etc?