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| Tags: space, time |
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#51
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"tadchem" wrote in message ... "T Wake" wrote in message ... wrote in message oups.com... Its an epedemic. And we can't contain it. What is? The 'epidemic' is the proliferation of stupid posters who strip all contextual cues from their replies and who use pronouns without referents so that rational people haven't got a clue what the morons are going on about. Fair one. I agree that is reaching epidemic proportions and there is very little we can do to contain it :-) |
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#52
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Hubble constant.
16 BLY away stars go away at c. Thats the edge of the VISIBLE universe. Outside the visible universe stars go away faster than c with respect to our center of our universe. But its universe has the same laws w do and a photon is c . Dark Energy is spacetime is 0 wavelength at c. The photon will pass you at 0 wavelenth at c. The only empty space is where a partical at c in orbit of atoms takes up space wile at c. Thats mass and more motion is more empty space more low . .................................................. ....... Gravity is the shape of the atom wile all its parts orbit the center of G , an eliptical orbit has a center of mass and a center of gravity. F is the distance from the center of gravity to the center of mass. |
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#53
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On 18 Aug 2005 10:11:08 -0700, "Randy Poe"
wrote: Nature does what it does. Amd Poe does what he does, which is to kiss as many asses as possible. ahahaha... ahahaha... AHAHAHAHA...ahahahaha... Louis Savain Why Software Is Bad and What We Can Do to Fix It: http://www.rebelscience.org/Cosas/Reliability.htm |
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#54
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DARTH VADER wrote:
What exactly is space time ? The totality of all events; "event" defined as a primitive, the same way "point" is a primitive in ordinary 3-dimensional geometry, representing something that has a specific location at a specific instant. A "point" of 3-D geometry is actually temporal -- comprising a stream of events that are considered to be "at the same place". Since "same place" is relative, the general concept comprises not just "static" points, but ALL continuous streams of events (i.e., all motions). Most human languages recognize this equivalence at a fundamental level in some fashion or another; some go further an explictly equate the concepts. For instance, in Japanese, the term for to "be at", to "go to" or to "come from" are all represented by the same word -- whose meaning is simply that of continuation of existence. Why cant we travell ... "Travelling" and "moving" are temporal notions. It doesn't make sense to talk about travelling through spacetime, itself; since the totality of all events is timeless. In what "time" would you travel through spacetime? You don't have yet another time running around for "moving" in spacetime. It's changeless and timeless. It's 3-D spaces (more accurately, layerings of spacetime into sequences of 3-D 'snapshots') that "move" in time; not spacetime, itself. Even there, the notion is not automatically a given. A 3+1 dimensional spacetime does not automatically admit any notion of "motion" or "change" globally in the sense of having a layering into 3-D spaces. A special property -- called "global hyperbolicity" is required for that to be the case. If a spacetime is not globally hyperbolic (e.g. one way for it to fail to be globally hyperbolic is if there exists a stream of events that ends up where and when it starts -- a 'time travel' loop), then the spacetime is not globally hyperbolic, there is no layering of it into 3-D spaces, and there is no notion of "change" or things "moving" in time -- except locally. Quantum theory requires a notion of time as change (i.e. a spacetime where 3-D snapshots "move" in time); so there is fundamental problems even defining what a quantum theory is supposed to be in a spacetime that is not globally hyperbolic. In contrast, relativity essentially rejects any notion of spacetime as "space moving in time", and rejects the notion of there being any such thing as "change" itself -- particularly since it allows for spacetimes that are not globally hyperbolic. |
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#55
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Hi Sam Definition of spacetime. A union of space and time originally
emerging from SR. Can be viewed as the "fabric" out of which the universe is fashioned,it constitutes the dynamic arena within which the events of the universe take place. I'm laughing because for the first time I let myself be a parrot. Those words are not mind,as you very well know. Good words.but natually not as good as mine. Beert |
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#56
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