also, Hows it impossiable to go faster then speed of light?
E=MC^2 + Lorentz tranformations. Essentially the closer to C you get, the more massive you become, thus the more inertia you have to overcome, and more energy needed to accelerate (this energy eventually approches infinity).
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lol at all the professors on the misc thinking their theory is correct...
no one knows for certain!
qft
It is the equivalent of chimps grasping the concept of calculus
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I don't understand how the universe can be expanding. If the universe encapsulates time and space then how can describe what exists outside when all our measurements of time and finite space become irrelevant?
I think if there is an edge to the universe it'd be something like a black hole like, after the event horizon time and space cease to exist, rather they don't account fof anything in the infinite blackness.
I don't understand how the universe can be expanding. If the universe encapsulates time and space then how can describe what exists outside when all our measurements of time and finite space become irrelevant?
I think if there is an edge to the universe it'd be something like a black hole like, after the event horizon time and space cease to exist, rather they don't account fof anything in the infinite blackness.
Strong mindf**k in this thread.
the aether outside of the universe is just that.... aether.....
if you were to travel that far beyond where energy has reached you would be engulfed and frozen to absolute zero and your atoms would be broken down into the aether.
now with enough energy ... lets say you're traveling with your good buddy universe X you could go as far as you wanted to go .....
end of thread
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I'm having astrophysics classes as an option in school (no nerd)
SCOOP : THERE ARE MANY THEORIES. However, no one can PROVE any of these theories. The fact is, we do NOT know how is the universe. Each theory has a leak, a singularity.
The theory we are studying in class : Just like any other component of the universe, it is logical to say the universe has a center where enormous mass is very dense. It is also very logical to think of the universe as a sphere, as it would obey to the laws of gravity. It is, however, impossible to reach a "limit" in the universe as it is expanding at speed light. It's impossible to reach c as it would take infinite ammount of energy according to e=mc^2.
Well I think its a matter of perspective what if the big bang theory is a cycle? big bang, collapse, big bang, collapse etc. is the time between the collapse considered seperate or is it one big timeline?
That's one monster timeline to think about. How would the universe collapse though? I don't think you could recycle the material of stars into a new universe going on a different cycle since the oldest stars mainly had a composition of just hydrogen and helium. As they aged, more heavy elements were thrown into the equation. That's why a 2nd or 3rd generation star is usually smaller.
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Mac: But our shenanigans are cheeky and fun!
Thorny: Yeah, and his shenanigans are cruel and tragic.
Foster:Which...makes them not really shenanigans at all.
Mac: Evil shenanigans!
Some consider that, just like big stars, the universe is going to implode. Laws of gravity will then be greater than the expanding energy. This theory is based on deduction :
Big stars act that way. Why would it be different with the universe?
Some consider that, just like big stars, the universe is going to implode. Laws of gravity will then be greater than the expanding energy. This theory is based on deduction :
Big stars act that way. Why would it be different with the universe?
Ehhh.... supernova type I or supernova type II? Trying to get a better understanding of how something endless could actually....
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Mac: But our shenanigans are cheeky and fun!
Thorny: Yeah, and his shenanigans are cruel and tragic.
Foster:Which...makes them not really shenanigans at all.
Mac: Evil shenanigans!
Indeed, some theories are contradictory. That's what makes it so complicated. I haven't studied this theory in class so I'm unsure of what it says...
Astronomy? What I mentioned were just the usual labels of how a star blows up. Honestly, the only way I could think if anything happening were if somehow all the universe's mass was caught in the middle to form one huge star that would eventually cause a supernova type II and blow everything away.
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Mac: But our shenanigans are cheeky and fun!
Thorny: Yeah, and his shenanigans are cruel and tragic.
Foster:Which...makes them not really shenanigans at all.
Mac: Evil shenanigans!
That's one monster timeline to think about. How would the universe collapse though? I don't think you could recycle the material of stars into a new universe going on a different cycle since the oldest stars mainly had a composition of just hydrogen and helium. As they aged, more heavy elements were thrown into the equation. That's why a 2nd or 3rd generation star is usually smaller.
well their are two basic theories based on the big bang. It all has to do with what type of universe we live in, a closed universe or an open universe. The question is will the universe expand to a point and then gravity start pulling the universe back (closed universe) and basically the reverse of the big bang happens (the big crunch) or will the universe expand infinite (open universe) until all the mass/energy ceases to move at all due to all mass/energy reaching absolute zero, or possibly even the universe expanding until it rips the fabric of our spacetime apart. (big rip)
I hate to go philosophical on you twats, but it's true.
That should not however stop someone from seeking out knowledge even if we don't understand things right away. It's like saying I'm not sure why that is, lets just say god did it.
Well I think its a matter of perspective what if the big bang theory is a cycle? big bang, collapse, big bang, collapse etc. is the time between the collapse considered seperate or is it one big timeline?
seperate. space and time are linked to make spacetime in general relativity, so there is no longer a "timeline", more like a spacetime 4D structure.
Quote:
Originally Posted by Curtiz
since the universe is expanding yes it does have an edge
in order to expand you must have an edge to build from spherical or square
the universe is homogenous and isotropic which leads directly to the idea that there are no "edge points" in the universe- there is no edge. your logic applies to the dimensions and geometries your brain has evolved to deal with, which is not nessecarily the dimensions and geometries of the cosmological universe as a whole.
Quote:
Originally Posted by EctoMan2000
I don't understand how the universe can be expanding. If the universe encapsulates time and space then how can describe what exists outside when all our measurements of time and finite space become irrelevant?
I think if there is an edge to the universe it'd be something like a black hole like, after the event horizon time and space cease to exist, rather they don't account fof anything in the infinite blackness.
Its not just some logical conclusion, its what we observe in amost every single galaxy- the universe is not static, it is expanding. Your defenition of expanding seems to draw on a comparison to what is outside the universe. but I don't think this comparison is nessecary. If you are in a room with opaque walls, and all the furniture is getting smaller to your eyes, you don't need x-ray vision to see outside the walls to deduce that the room is growing.
The key point in cosmology is that there is no edge, every single point in the universe is the same as every other- space is homogenous.
Quote:
Originally Posted by JennaClaire
Ehhh.... supernova type I or supernova type II? Trying to get a better understanding of how something endless could actually....
Not exactly the same as a star. A star has pressure acting as a balancing force against its own gravity. With the universe, general relativity actually equates the pressure of radiation in the universe as an energy density (check it out, the units of pressure and energy density are the same!), so radiation pressure, as an energy, is equivalent to a mass, and it gravitates. So the universe's pressure causes even more gravity!
The simply theory is that everything gravitates towards each other, and this overcomes the initial expansion to to the big bang, ie. the "escape velocity" of the universe is too large, and everything stops and starts contracting again. But we dont really need to worry about this since the "big crunch" was more or less ruled out by observations 20 years ago.
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I am revising cosmology so this probably explains why I keep posting in physics type topics.
It is the equivalent of chimps grasping the concept of calculus
so? science would be nowhere if everyone decided to quit when they didn't understand something. That's what separates us from chimps.
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