Gravity

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Gravity Empty Gravity

Post by Guest on Sat Jan 24, 2015 12:12 am

Discuss

what is it
where is it

does it have one center

does it have many centres


yada yada yada

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Gravity Empty Re: Gravity

Post by Guest on Sat Jan 24, 2015 12:25 am

Gravitation is most accurately described by the general theory of relativity (proposed by Einstein) which describes gravitation as a consequence of the curvature of spacetime

IMHO this makes more sense
the curvature of spacetime is a consequence gravitation



Last edited by korban dallas on Sat Jan 24, 2015 3:12 am; edited 1 time in total

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Gravity Empty Re: Gravity

Post by Guest on Sat Jan 24, 2015 3:09 am

Also on further thought space isn`t curverd ........its stretched

like for example a sheet of cling film being pulled along its x,y,z axises


Last edited by korban dallas on Sat Jan 24, 2015 3:52 am; edited 1 time in total

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Gravity Empty Re: Gravity

Post by Guest on Sat Jan 24, 2015 3:15 am

pretty sure this is wrong and misleading

Gravity Index11


.....

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Gravity Empty Re: Gravity

Post by Ben Reilly on Sat Jan 24, 2015 8:53 pm

korban dallas wrote:pretty sure this is wrong and misleading

Gravity Index11


.....

That's what I always thought, but then, the topic is very confusing for me -- especially as it would seem that the theory of gravitons and gravitational waves conflicts with the theory of space-time curvature as the cause of gravity. Then again, I might just be refusing to see them as both simultaneously true, as a few big brains discuss over here: http://physics.stackexchange.com/questions/427/nature-of-gravity-gravitons-curvature-of-space-time-or-both

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Gravity Empty Re: Gravity

Post by Ben Reilly on Sat Jan 24, 2015 8:57 pm

korban dallas wrote:pretty sure this is wrong and misleading

Gravity Index11


.....

I always thought it would be better to illustrate that with the Earth suspended in gelatin Smile

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Gravity Empty Re: Gravity

Post by Guest on Sat Jan 24, 2015 10:15 pm

Ben_Reilly wrote:
korban dallas wrote:pretty sure this is wrong and misleading

Gravity Index11


.....

I always thought it would be better to illustrate that with the Earth suspended in gelatin Smile
the picture is fundementaly wrong because (i believe ) it dipicts the mass of the earth(in this case) distorting the fabric of space in the wrong direction because it is a 2d representaion along 1 axis

the problem is that space is not 2d and the picture shows distortion due to the objects mass (like a ball on a sheet ) but the force on spase is omnidirectional, like gravity which is a force of attraction
so space would be pulled towards it from every direction so instead of a picture showing the mass at the bottom of the well what it shoud show is the mass at the top of a dome created as space is pulled towards the mass  
Gravity Index210

kind of like this mannifold but in all direction

for example if you took a block of gelatin with a inflated balloon at its center then sucked out the air of that balloon.(simulating a gravitational force )
The surounding gelatin (space) would be pulled/streched  towards the centre of the void from every direction

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Gravity Empty Re: Gravity

Post by Original Quill on Sun Jan 25, 2015 4:44 am

korban dallas wrote:pretty sure this is wrong and misleading

Gravity Index11

.....

Well, one problem is that the representation is two-dimensional.  But the bending of space/time thesis is questioned these days, my brother tells me.  (He is a physicist at Los Alamos.)

Einstein's distortion of space/time only begs the question for me.  The question I've always had is, what is the interaction (or dimension) that causes it?  If mass bends space/time, why...or how?

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Gravity Empty Re: Gravity

Post by Ben Reilly on Sun Jan 25, 2015 6:59 am

That's way above my pay grade, Quill. As it stands, I'm nearly ready to accept Intelligent Falling:

http://www.theonion.com/articles/evangelical-scientists-refute-gravity-with-new-int,1778/

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Gravity Empty Re: Gravity

Post by Andy on Sun Jan 25, 2015 8:37 am

Gravity is a myth.

The earth sucks.

That is my theory.

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Gravity Empty Re: Gravity

Post by Original Quill on Sun Jan 25, 2015 5:02 pm

Handy Andy wrote:Gravity is a myth.

The earth sucks.

That is my theory.

Gravity Images?q=tbn:ANd9GcRFZ2LnRzu3fNp_EklxXXJerM9henxMpWjcU2bqLfKvVApgVgjMadFPLw It's settled, then.

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Gravity Empty Re: Gravity

Post by Ben Reilly on Sun Jan 25, 2015 8:41 pm

Gotta love how the ISS had all the heating, oxygen and gravity-independent toilets for Sandy to float around like that Smile

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Gravity Empty Re: Gravity

Post by Original Quill on Sun Jan 25, 2015 8:54 pm

Ben_Reilly wrote:Gotta love how the ISS had all the heating, oxygen and gravity-independent toilets for Sandy to float around like that Smile

Haha...she held her water, and she was scared shitless.

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