The Elegant Universe - Einstein's Relativity

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The Elegant Universe - Einstein's Relativity

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Einstein's General Theory of Relativity explained.

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Tags for this video: albert astronomy brian einstein elegant gravity green newton pbs physics relativity space the time universe

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Array ( 1 week ago by vjfit)

i dont like it.
can any one tell me why the earth(or any satellite) doesn't fly off or spiral in to the gravity well? what, the forces are perfectly balanced? i dont like it...

angular momentum ( 1 week ago by umagongdi)

angular momentum

you need to ... ( 1 week ago by beastinblack)

you need to mentally visualise, like a mental movie, thats how einstein did it and it is the best way to understand

What a fool you are ... ( 1 week ago by naveengta)

What a fool you are! We humans have also proved that Jesus of Nazareth never existed, also that he (among many others like Muhammad, Krishna) is a adaptation of the Egyptian god "Horus" of the Ancient Egyptian Civilization.

Wasn't this OJ's ... ( 6 days ago by emanmark)

Wasn't this OJ's theory he was trying to get back at that hotel in Vegas?

If the universe is ... ( 6 days ago by larigopsolis)

If the universe is expanding,why do i find it more difficult everyday to find a parking spot?? Huh??

lawl ( 5 days ago by p3erf80g4949)

lawl

maby because the ... ( 5 days ago by p20h03)

maby because the univers is not the earth

would actually be ... ( 5 days ago by thomashughes25)

would actually be better to say "Their was space before the Big Bang" this makes much better sense, heres why: You would reply " But Space and time are inseparable" I would then say " If space was empty, No radiation, no planets, no heat, no elements, NOTHING, not even someone to observe this (even if their was your sensies would be useless), then How could time exist without objects, their needs to be objects or atoms for their for their to be time, therefore NEXT COMENT.

pace can exist ... ( 5 days ago by thomashughes25)

pace can exist without time." You need objects to exist for their to be time (physical not social time), space being nothing is literally 'nothing' its a void, no movement of anything, no reference to Before or after an object, atom moved. But then... The inevitable question of "how did the atoms, or objects come from nothing" will rear its ugly head, to which, i, like everybody else, has no answer i dont know..........

The problem with ... ( 5 days ago by thomashughes25)

The problem with this "theory" (and thats all it is), is that it still has all the other common problems, and the same arguments in common with Space-time, i have, however (depending on which way you look at it), got rid one of the Space-time arguments, "Space goes hand in hand with time, and vice-versa". :) PLEASE ARGUE AGAINST THIS, I WONT BE OFFENDED.....NOT LIKE SOME OF THE "GUYS" ON HERE!! :)

"Space goes hand in ... ( 5 days ago by Christophurrrr)

"Space goes hand in hand with time, and vice-versa".
Well, in the theory of relativity you are right. Time is a constant, a propulsion device (i use the word propulsion with heed if time is actually a constant) in which light is able to travel through the dark energy of space. If time did not exsist, light, matter, or any kind of energy would not be measurable since it could never expand.

"Their was space ... ( 5 days ago by Christophurrrr)

"Their was space before the Big Bang"
I believe, (and this is totally disputable with other evidence. I welcome it) that the universe has always existed. Lets take the function f(x)=1/x. The basic result is that there is no beginning since the function never reaches zero and is forever expanding negatively and positively in both directions... continued above

Now if the universe ... ( 5 days ago by Christophurrrr)

Now if the universe expands and retracts then it could have always existed. Thus being, we have only discovered the previous expansion (big bang) in our existence. Now the explaination for why this happens is unknown and maybe be an act of its own nature.

I'm just curious if ... ( 4 days ago by mandangalo18)

I'm just curious if you realize how powerful a scientific theory is? Such an arbitrary dismissal ("The problem with this "theory" (and thats all it is)") of a scientific theory makes me wonder.

Ok yeah i agree ... ( 4 days ago by thomashughes25)

Ok yeah i agree dude, but i wasn't referring to the real scientific theories, i was referring to mine, but now you come to mention it, it does read as though im degrading the word theory,.....(which actually, as i think your pointing out, is a very strong and meaningful word). i should have said "The problem with this idea (and thats all it is)" I think thats why i put the "" around "theory", i think i was trying to say: "theory" (if you can call it that).Oh well My bad, nicely pointed out!! :)

"i wasn't referring ... ( 4 days ago by mandangalo18)

"i wasn't referring to the real scientific theories, i was referring to mine" I didn't catch that. Now I know, and knowing is half the battle!

gravity the main ... ( 3 days ago by callasexperience)

gravity the main track of spinal tap they know....

i am amazed at the ... ( 3 days ago by durs6)

i am amazed at the amount of info being thrown around. but if you look closely you will see most of the comments are from people who cant even spell.. so really -like a scientist, CHECK EVERY THING.. planks..

from what i ... ( 2 days ago by colemanizer)

from what i understand, yes, the universe may have always existed, but only the events that occur after the big bang are relevant today and would have any sort of effect. so... basically you could say that the big bang is the beginning of our universe, and past universes are irrelevant.

ahh but i also ... ( 11 hours ago by maXrUm)

ahh but i also heard that the earth is expanding, and that the pangea theory really is not true at all.

f(x)=1/x? That ... ( 9 hours ago by Jim1905)

f(x)=1/x? That doesn't go up positively and negatively in both directions. You can use limits to say as x approaches pos. and neg. infinity, f(x) approaches 0. It blows up as x goes to 0, obviously and that limit doesn't exist. Or perhaps, you mean x never reaches zero, in this case that has nothing to do with your idea about a continually expanding and contracting universe. A better example would be to us a sine or cosine function.

If the fabric of ... ( 8 hours ago by Mistahjey)

If the fabric of space/time like in the video keeps the earth at the edge of fabric "hole" made by the sun. How will this theory of fabric curves and lines keeps and holds other planets? There must be a better theory that will explain this.

Because the ... ( 5 hours ago by Chirios1)

Because the curvature of spacetime isn't static. Its not lke one small part gets curved and the other stays flat; all of spacetime is curved so everything feels the effect of the curvature, its just that as you get farther away the effect of the curvature felt is less.

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