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#11
09-09-2005, 06:04 PM
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Re: Pulsating universe theory
[ QUOTE ]
[ QUOTE ] Your wacky schemes can't save you. One day you'll just have to die, like all the others. [/ QUOTE ] agreed. but could robots do it? [/ QUOTE ] Also, forgot to mention, I will have my brain implanted in a robot body with the strength of 10 gorillas, so I'll be fine. I'll just strap myself into my FTL ship with my go-rilla strength and take a trip back to 1982 to hang with Uncle Rico. 
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#12
09-09-2005, 06:04 PM
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Re: Pulsating universe theory
[ QUOTE ]
[ QUOTE ] [ QUOTE ] Your wacky schemes can't save you. One day you'll just have to die, like all the others. [/ QUOTE ] agreed. but could robots do it? [/ QUOTE ] Also, forgot to mention, I will have my brain implanted in a robot body with the strength of 10 gorillas, so I'll be fine. I'll just strap myself into my FTL ship with my go-rilla strength and take a trip back to 1982 to hang with Uncle Rico. [/ QUOTE ] i get to be a tiger-bot
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#15
09-10-2005, 03:42 PM
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Re: Pulsating universe theory
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No more chance than a piece of terd escaping a toilet flush, my man [img]/images/graemlins/wink.gif[/img] [/ QUOTE ] So youre saying there is a chance? YES!!!!!!!!!
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#16
09-10-2005, 03:43 PM
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Re: Pulsating universe theory
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Current thinking is that the universe will continue to expand forever, and in fact in will contiue to expand at an ever increasing rate, see here. [/ QUOTE ] Im pretty sure that there are 3 or 4 current theories out there. One is that it will expand and slow down. One is the one you mention. One is that it will pulsate. Im not sure what string theory has to say on this subject...
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#17
09-10-2005, 04:43 PM
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Re: Pulsating universe theory
You're right, but there is more to the picture.
Certainly until relatively recently there have been 3 theories. The first is that the universe is expanding rapidly enough that gravity will never "take hold" and force a collapse. However, rate at which the universe expands will gradually reduce due to the action of gravity on all the matter in the universe. The second is that gravity will take hold and cause all the matter in the universe to collapse back on itself. We could potentially get another big bang event or whatever at that point, it's unknown. The third option is that there is exactly the right amount of matter so the universe "just" stops expanding then sits there, in balance. Until the late 1990s these were the accepted possibilities. Recent observations of a certain supernova type have shown us that the universe is expanding at an ever increasing rate. This is a very significant result. The implication is that there is some additional force that we cannot currently explain which is acting against gravity and pushing the matter in the universe apart faster and faster. The clever particle and string theory guys call the cause of this force "dark matter". It's highly significant, and probably the most exciting development in modern physics in the last 20 years. It will be huge when we figure out the details.
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#18
09-10-2005, 05:24 PM
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Re: Pulsating universe theory
[ QUOTE ]
You're right, but there is more to the picture. Certainly until relatively recently there have been 3 theories. The first is that the universe is expanding rapidly enough that gravity will never "take hold" and force a collapse. However, rate at which the universe expands will gradually reduce due to the action of gravity on all the matter in the universe. The second is that gravity will take hold and cause all the matter in the universe to collapse back on itself. We could potentially get another big bang event or whatever at that point, it's unknown. The third option is that there is exactly the right amount of matter so the universe "just" stops expanding then sits there, in balance. Until the late 1990s these were the accepted possibilities. Recent observations of a certain supernova type have shown us that the universe is expanding at an ever increasing rate. This is a very significant result. The implication is that there is some additional force that we cannot currently explain which is acting against gravity and pushing the matter in the universe apart faster and faster. The clever particle and string theory guys call the cause of this force "dark matter". It's highly significant, and probably the most exciting development in modern physics in the last 20 years. It will be huge when we figure out the details. [/ QUOTE ] I didnt know that dark matter was a force [img]/images/graemlins/confused.gif[/img] correct me if im wrong, but didnt we discover (or at least think we did) that the universe is slowing down based on the dopler effect? I recall learning that somewhere. this site is awsome and has a detailed explination of dark matter as we know it. I will be reading this for hours.
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#20
09-10-2005, 05:59 PM
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Re: Pulsating universe theory
[ QUOTE ]
correct me if im wrong, but didnt we discover (or at least think we did) that the universe is slowing down based on the dopler effect? I recall learning that somewhere. [/ QUOTE ] I don't remember that and I would have wanted to notice such a discovery (although that doesn't mean it didn't happen). You may be thinking of the discovery that the universe is expanding? It's always been a goal of cosmology to figure out the mass of the universe. This was the holy grail, and would allow us to figure out the "hubble constant". IE: Is the universe going to collapse on itself or expand forever. Various estimates of the Hubble constant have been made over the years, some predicting a crush, some an expansion. However the big shock came in 1998 when "q" (see link above) was found to be negative, implying that not only the universe is expanding, it is expanding at an ever increasing rate. Something is pushing matter apart over vast distances more strongly than gravity is pulling it together. WTF eh?!
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