Look up Edwin Hubble (the person not the telescope) and Hubbles law to understand why it's thought that the universe is expanding away from a point 😉
And brush up on Einstein's theory of relativity to understand why that point is wherever you happen to be standing
Isotropicity and light
Now this is more like it......
"Like a hall of mirrors, the apparently endless universe might be deluding us. The cosmos could, in fact, be finite. The illusion of infinity would come about as light wrapped all the way around space, perhaps more than once--creating multiple images of each galaxy. A mirror box evokes a finite cosmos that looks endless. The box contains only three balls, yet the mirrors that line its walls produce an infinite number of images. Of course, in the real universe there is no boundary from which light can reflect. Instead a multiplicity of images could arise as light rays wrap around the universe over and over again. From the pattern of repeated images, one could deduce the universe's true size and shape."
source: Cosmology 101
Indeed, if the universe is isotropic like Pac-Man (he walks off the right screen and appears on the left), then light may have had the chance to circumnavigate the entire universe already.
I really have issues with this Pac-Man universe, but at the same time I'm starting to understand now that us existing right in the centre of the Virgo supercluster, which itself is very central to the universe in it's entirety, looks very unlikely to the naked eye.
Now this is more like it......
"Like a hall of mirrors, the apparently endless universe might be deluding us. The cosmos could, in fact, be finite. The illusion of infinity would come about as light wrapped all the way around space, perhaps more than once--creating multiple images of each galaxy. A mirror box evokes a finite cosmos that looks endless. The box contains only three balls, yet the mirrors that line its walls produce an infinite number of images. Of course, in the real universe there is no boundary from which light can reflect. Instead a multiplicity of images could arise as light rays wrap around the universe over and over again. From the pattern of repeated images, one could deduce the universe's true size and shape."
source: Cosmology 101
Indeed, if the universe is isotropic like Pac-Man (he walks off the right screen and appears on the left), then light may have had the chance to circumnavigate the entire universe already.
I really have issues with this Pac-Man universe, but at the same time I'm starting to understand now that us existing right in the centre of the Virgo supercluster, which itself is very central to the universe in it's entirety, looks very unlikely to the naked eye.
The mystery exa-supernovaeic Gamma-Ray bursts
Nice info in this link 🙂
A Mystery: Gamma Ray Bursts
After reading that link I now wonder if the big bang was simply two ultra-massive black holes which collided with one another.
Surrounding them was exa-chaotic and mostly anti-gravitational dark energy, thus these ultra-massive spheres were slowly rolling around in the ultra-universe, until they collided by chance.
The collision resulted in our current universe.
It's like the white ball and the black ball on a green billiard table. They collided and we are expanding into that green, the green is unlimited in size and different in time.
Copyright me, just in case, hehe. 😛
Nice info in this link 🙂
A Mystery: Gamma Ray Bursts
After reading that link I now wonder if the big bang was simply two ultra-massive black holes which collided with one another.
Surrounding them was exa-chaotic and mostly anti-gravitational dark energy, thus these ultra-massive spheres were slowly rolling around in the ultra-universe, until they collided by chance.
The collision resulted in our current universe.
It's like the white ball and the black ball on a green billiard table. They collided and we are expanding into that green, the green is unlimited in size and different in time.
Copyright me, just in case, hehe. 😛
I would think if two black holes collided it would result in just a larger black hole
I personally think that the big bang was the interaction between something that pre-existed the big bang itself and that the universe as we know it began as a particle of a finite size and not an infinitely small singularity that came from nothing, my guess is at the time of the big bang something jumped a bandgap
I personally think that the big bang was the interaction between something that pre-existed the big bang itself and that the universe as we know it began as a particle of a finite size and not an infinitely small singularity that came from nothing, my guess is at the time of the big bang something jumped a bandgap
I guess the latter must be true, for I am experiensing the same.... lol
But still there is no answer to the original question.. To be able to answer that question, one needs to have some idea of the current shape. Problem there is that the horizon does not stretch to the limits of our universe. I don't think that question is likely to be answered.
I guess the latter must be true, for I am experiensing the same.... lol
But still there is no answer to the original question.. To be able to answer that question, one needs to have some idea of the current shape. Problem there is that the horizon does not stretch to the limits of our universe. I don't think that question is likely to be answered.
I can't think of a single example from the modern science era (say, post-1800).
Personally I had never heard of the notion until the Gamma-Ray article.
"for them to be seen at very large distances they must correspond to events in which as much as 100 times the energy of a supernova"
"On average, about one every day the gamma-ray sky lights up with a spectacular explosion."
"What Are They?
Such enormous amounts of energy suggest a gravitational source. Two popular ideas are the merger of two black holes or the merger of two neutron stars. However, although such events might yield the required energy, it is not clear that they can be made consistent with all the observations. Thus, the source of gamma ray bursts remains one of the most important mysteries in modern cosmology."
:itisamystery:
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As you live in a democracy you may construct your own personal definition of what is meant by 'universe'. Modern science is quite clear: 'universe' means not just stuff but space too. The universe is not contained in space: it includes space as part of itself. Some may find this counter-intuitive; reality is like that!JoeDJ said:
It is quite possible to use general relativity to construct and examine the mathematical properties of empty universes. Empty space does exist! The fact that empty space is possible raises the question "why is there stuff?".
No, you call it space. We don't call it anything, for it is not.
This is why I do not think the universe is expanding. I think what he saw was misinterpreted.
I have to go to work, but I will get into detail later.
Up until a couple of months ago my wife and I had custody of her granddaughter.
When she came to live with us about four years ago, on an occasion at our GP (General Physician) the subject of birth control came up.
Our GP responded:
"I consider pregnancy in teenagers to be an STD (Sexually Transmitted Disease)."
Two black holes colliding.
If matter and antimatter can exist could one black hole have been matter and the other antimatter. Such a collision would indeed release a great deal of energy.
If matter and antimatter can exist could one black hole have been matter and the other antimatter. Such a collision would indeed release a great deal of energy.
That scenario could easily wipe out an entire galaxy, for the combined mass would be converted into energy... 🙄
what I find is kind of weird is that every night you look up/out into the sky, is that the darkness is getting ever so slightly brighter because the light from every star is eventually going to reach our planet and our night will eventually become a sort of daylight .... even when some of those stars are gone (sort of)..
Just for interest,
Three Supermassive Black Holes Tango in a Distant Galaxy, Marking a Huge Discovery
Regards
M. Gregg
Which would just as likely escape nowhere but convert back to
mass in constant equilibrium. At the extreme, mass and energy,
probably all the same thing.
If we assume equilibrium might occur at 50% energy, 50% mass.
We are still talking 50% the mass of TWO supermassive holes...
So, this presumed release of energy thats going to easily wipe out
an entire _______ is not going anywhere...
There is a possibility that the gravities of matter and anti-matter
repel, and the proposed merger could never occur. But since we
never see reversed lensing, both assumed types of galaxy would
appear to exert the same curve of spacetime upon passing energy.
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