juantoo3
....whys guy.... ʎʇıɹoɥʇnɐ uoıʇsǝnb
Kindest Regards, Tao!
Dr. Hubble discovered the same concept regarding light as applied to other galaxies. This is called "red shift." As other galaxies race away from ours, the light "shifts" towards the red end of the spectrum. And it was also noticed that many galaxies are racing from the same starting point in space. Vajradhara posted something about a year ago pertaining to some thorough catalogue of this that was only completed at that time. It was this same starting point for galaxies that suggested a collective beginning at a singular point in the universe.
Now, from what I am understanding, there are complications with the red shift, because the galaxies are speeding up as they get farther away. In classical physics this should not be...because of friction, entropy, etc., the galaxies should be slowing. But they are not. Which begins to raise questions regarding the hypothetical nature of such postulated concepts as dark matter or energy, or possibly some other super-gravitational "pulling power."
The last I heard the best estimate back to a common source was on the order of 14 Billion years. Interesting, theoretical physics can take us to a moment a tiny of a fraction after the Big Bang, but we still can't understand the "G-d Particle" of the precise moment of the Bang. Now, using the same theoretical physics, it was actually some time before the first star could coalesce out of the super heated cauldron of matter and energy, something on the order of 1/4 to 1/3 of its life so far. So for a star to be as old as the universe is simply not possible...kinda like being born with a driver's license, one must go through all of the steps in order first.
No more a leap of faith than to consider otherwise. At least one has observable physics to assist in guiding such a faith.
Ah yes, p-branes and all that. We did get a sophomorish chuckle out of the name.
This presupposes a multiverse. I am not completely adverse to the idea, but I take it with a grain of salt until proven otherwise, which is the crux of the matter. We are arguing one hypothetical against another here...and the idea of Big Bang at least is based on empirical observation, rather than the hypothetical guesstimate of theorhetical mathematics that stand behind the multiple universe idea.
So, presuming this is the *only* universe, and black holes are not doors, and that the mass of energy and matter continue collecting, is there a point of critical mass when another, perhaps smaller "Mini Bang" occurs? Is there a point, perhaps when the universe is so old that few stars remain and the rest are burnt out hulks of their former selves, that the combined gravitational pull of all of the collective black holes engulf each other and what remains of any universe? Could this be how, analogous to an exhaled and inhaled breath, one cycle of an infinite universal cycle, completes itself?
These questions tread on the nature of gravity. For all of the hypothetical and theorhetical guesses and imaginings, gravity is a known and a constant, yet still a complete mystery to us. We know it exists, but we haven't got a clue just what it is or what it is made of.
The Big Bang is based on the Doppler effect on lightwaves. I learned of Doppler using a railroad train and the sound of the whistle as it approaches and then passes by. The tone of the whistle remains the same, but as it approaches the sound waves "bunch up" and as it continues away the sound waves "extend out," the result being what sounds to the human ear as two distinctly different sounds emitted from the same tonal whistle.Hi Juantoo
I have a bit of trouble with this big bang derived theory of limited matter/energy. Basicly the figure used in measuring the mass of the universe is a guess. And we are only able to detect a small fraction of what is supposed to be there.
Dr. Hubble discovered the same concept regarding light as applied to other galaxies. This is called "red shift." As other galaxies race away from ours, the light "shifts" towards the red end of the spectrum. And it was also noticed that many galaxies are racing from the same starting point in space. Vajradhara posted something about a year ago pertaining to some thorough catalogue of this that was only completed at that time. It was this same starting point for galaxies that suggested a collective beginning at a singular point in the universe.
Now, from what I am understanding, there are complications with the red shift, because the galaxies are speeding up as they get farther away. In classical physics this should not be...because of friction, entropy, etc., the galaxies should be slowing. But they are not. Which begins to raise questions regarding the hypothetical nature of such postulated concepts as dark matter or energy, or possibly some other super-gravitational "pulling power."
Take this as an example:
Question: How old is the oldest star?
shannon m connolly
Answer: That's an interesting question. From what we know of the
evolution of stars (that is, how they change as they get
older) there seem to be some stars around that are roughly
15 billion years old. However, recent measurements of the
age of the universe suggest that the entire universe is
younger than that (maybe 10 billion years). The answer is
probably somewhere between those two numbers.
asmith (taken from the "ask a scientist" website)
I have read about stars now dated at at 18 million years where as most physicists tend to agree the big bang took place 13.8 billion years ago. There are huge holes and inconsistencies in current models. What we do know is that whatever devices of measurement we build we keep seeing further and further or more and more. And everywhere we look we find things that fit our perceptions but more importantly many that do not.
The last I heard the best estimate back to a common source was on the order of 14 Billion years. Interesting, theoretical physics can take us to a moment a tiny of a fraction after the Big Bang, but we still can't understand the "G-d Particle" of the precise moment of the Bang. Now, using the same theoretical physics, it was actually some time before the first star could coalesce out of the super heated cauldron of matter and energy, something on the order of 1/4 to 1/3 of its life so far. So for a star to be as old as the universe is simply not possible...kinda like being born with a driver's license, one must go through all of the steps in order first.
To say that there is a finite amount of matter is a bit of a leap of faith in theories that are as watertight as colanders.
No more a leap of faith than to consider otherwise. At least one has observable physics to assist in guiding such a faith.
Over on another thread Flow left a link to a harvard scientist working on branes.
Ah yes, p-branes and all that. We did get a sophomorish chuckle out of the name.
In her mathematics we see that the expression of matter on our brane is not necessarily a universal expression. Gravity is entirely dependent on what we perceive as mass, for example, but on an adjacent brane this almost negligibly weak force is massive. Can you imagine living in a universe where each person weighs billions of tons? Or another one where we to a people there seem just as heavy to them?
This presupposes a multiverse. I am not completely adverse to the idea, but I take it with a grain of salt until proven otherwise, which is the crux of the matter. We are arguing one hypothetical against another here...and the idea of Big Bang at least is based on empirical observation, rather than the hypothetical guesstimate of theorhetical mathematics that stand behind the multiple universe idea.
You do raise at least one point that intrigues me, and that is "where does the matter / energy go that is trapped in a black hole? Related to it, is where did the "super mass" that exploded into the Big Bang come from, if it was surrounded by nothing? Now, this brane hypotheses suggests what is ultimately a door or channel into another universe, sort of like walking from one room to another, although you might not be the same you once you pass through. Conventional Astrophysics suggests that black holes trap and hold the vast majority of the matter and energy "unfortunate enough" to happen into their grip. (I do personally know of at least one Astrophysicist who had a paper published a couple of years ago, Hooray!, long time coming, who was able to explain why certain radiation is able to escape, and this serves to explain certain gamma ray bursts that are recorded from time to time.) This matter / energy then collects and continues to collect, increasing the mass and gravitational pulling power of the black hole. It is also interesting to note that black holes are born out of dead stars, that something that gave for millions and billions of years is now set up to take back for millions and billions of years.The exchange of matter between branes can take place and if there are an infinite number of those then there could indeed be an infinite amount of matter. Its like a chain of numbers, which despite cyberpi's protestations is potentially infinite in either direction. Say we live on a brane arbitrarily numbered 42. Well branes 41 and 43 will find ways to exchange mass with our brane as ours will with them. Perhaps big bangs and black holes are the big dramatic examples of this. Anyhow my point is that front line physics is far from certain about there being a finite mass. And thus it is not really a very good case for arguing a finite universe.
So, presuming this is the *only* universe, and black holes are not doors, and that the mass of energy and matter continue collecting, is there a point of critical mass when another, perhaps smaller "Mini Bang" occurs? Is there a point, perhaps when the universe is so old that few stars remain and the rest are burnt out hulks of their former selves, that the combined gravitational pull of all of the collective black holes engulf each other and what remains of any universe? Could this be how, analogous to an exhaled and inhaled breath, one cycle of an infinite universal cycle, completes itself?
These questions tread on the nature of gravity. For all of the hypothetical and theorhetical guesses and imaginings, gravity is a known and a constant, yet still a complete mystery to us. We know it exists, but we haven't got a clue just what it is or what it is made of.