A piece of history

astroron (Ron) · #1 31-05-2009, 05:25 PM

A little piece of history I thought was of interest.

http://news.bbc.co.uk/2/hi/science/nature/8061449.stm

Robh (Rob) · #2 31-05-2009, 11:25 PM

Ron,

Nice piece of history.
I can't believe it's already 90 years since Eddington's observation and confirmation of general relativity via the bending of light (gravitational lensing).
You would have thought we would be further ahead than we are today.
I guess the maths and physics has bamboozled us somewhat!

Regards, Rob.

astroron (Ron) · #3 31-05-2009, 11:36 PM

Thanks Rob

as a math dunce

I cannot understand all the numbers

but can understand the theory

xelasnave · #4 01-06-2009, 03:48 PM

I like it... out of all the representations of the space time grid the one in the article is the first and only one that I have ever noticed that has the space time grid bent in the correct manner... the grid bends to mass not around a mass as the ball and the blanket offers for example.. a very misleading example taken up and propogated via artist impressions of gravitational lensing... it irritates me beyond belief the various representations of gravitational lensing that have been drawn with the ball and blanket dictating a stupid presentation of the matter.

alex

Nesti (Mark) · #5 07-06-2009, 03:46 PM

Quote:

Originally Posted by xelasnave

the space time grid bent in the correct manner... the grid bends to mass not around a mass as the ball and the blanket offers for example...it irritates me beyond belief the various representations of gravitational lensing that have been drawn with the ball and blanket dictating a stupid presentation of the matter.

alex

Great call Alex - I couldn't agree more.

This is what I meant when I posted "Dragging the spacetime carpet INTO the cellar, furniture and all, and without effort...like water down a drain, taking the soap bubbles with it". A fast enough body, moving past this body will follow a curved pathway (Geodestic) which looks like a stright line from the bodies perspective, within the [curved but constant] metric but is looks bent or warped outside the gravitational infulence, in flat space [flat and constant metric].

Cheers
Mark