Back to gravity. Einstein's theory of general relativity is the current best theory of gravity that we have. It has yet to be disproved by any experiment, real or imagined, that has been undertaken. It is one of the most successful theories of 20th century science, and led directly to very many of the technological advances that occurred later in the 20th century that we all now take for granted.
What part of all of that do you not get?
THIS BIT IRISH!
According to any standard textbook on science Einstein’s GTR of 1915 is an expansion of his STR of 1905 with further revelations.
‘By a series of remarkably creative and idiosyncratic steps, Einstein decided that space is not flat but curved, and the local curvature is produced by the pressure of mass in the universe. Consequently bodies moving through curved space did not travel in straight lines but rather follow the path of least resistance along the contours of curved space. These paths are called geodesics. If this were true there would be no need for a mysterious ‘force of gravity’ that is transmitted instantaneously. Nor would it be necessary to explain the odd coincidence that inertial and gravitational mass are exactly the same.’---J.P. McEvoy and O. Zarate: Introducing S. Hawking, Icon Books UK, p.30.
To begin with, Einstein proposed the universe is a surface-sphere and consequently finite. Goodbye Newton’s ‘infinite’ universal gravity. After that he said space is made up of a 4-dimensional fabric, so to speak, the vertical lines, the horizontal lines, the depth lines and space-time dimension. Add a large cosmic body to it and it creates ‘curves and warps’ in this fabric of space, just as a trampoline bends with the weight of a person. This ‘whirlpool’ will now suck in and hold smaller bodies that will orbit around it. In our part of the universe the sun is the big cosmic body causing the bowl and the planets we know whirl around the sides creating what is known as our solar system.
This idea, pure invention of course, something any science-fictionist could have proposed, has, even we admit, an attractive appeal about it. Is it any wonder then that ‘many physicists believe this theory to be the most perfect and aesthetically beautiful creation in physics, perhaps in all science? ---Jeremy Bernstein: Einstein, p.63.
‘The general theory of relativity is a complicated business. It is said that even by 1919 there were only two people who fully understood it: Einstein and Eddington. (This, let us hasten to add, is based on a quip of Eddington’s.) Even to this day, theorists are not completely united about what follows from Einstein’s theory…’---H. Collins and T. Pinch: The Golem p.43.
The bad news is that the mathematics is extremely difficult. There are some 20 simultaneous equations with 10 unknown quantities. The equations are almost impossible to solve except in situations where symmetry or energy considerations reduce them to simple forms. If we ignore the cosmological constant lambada (which doesn’t belong there anyway) and consider free space where the mass is zero, the equations can be written simply.'--- J.P. McEvoy and O. Zarate: op. cit., p.39.Later it was disaster for Einstein’s GTR. It seems that when they did the mathematics in the 1980s or so, they found there wasn’t enough matter in the universe to accommodate Einstein’s gravitation theories. So, what did they do? Well, as Newton theory had to invent ‘perturbations,’ for Einstein’s universe they invented ‘dark matter’ to solve their problem. So, where is it? ‘Out there in space, stupid, but because we cannot see it, it is invisible matter.’ And you know what; they spent the last 90 years looking for it. We kid you not. One of the latest searches is described on the Vanderbilt University website like so:‘Most of the matter in the universe may be made out of particles that possess an unusual, donut-shaped electromagnetic field called an anapole. In the article, titled “Anapole Dark Matter,” the physicists propose that dark matter, an invisible form of matter that makes up 85 percent of the all the matter in the universe, may be made out of a type of basic particle called the Majorana fermion. The particle’s existence was predicted in the 1930’s but has stubbornly resisted detection.’--2013.The ‘science’ of dark matter now has over 79,000,000 websites, not bad for ‘a hypothetical kind of matter that cannot be seen with telescopes but would account for most of the matter in the universe,’ as Wikipedia records.Impressed, we bet you are, but not Professor Arthur Lynch:
‘“And that’s why your daughter is dumb” as the quack doctor of Moliere concluded, though his arguments seem to me a model of cohesion and clarity compared with this of Einstein. It may be my own deficiency, and if, dear reader, you have made good sense out of this, I admit that your intellect soars at a range inaccessible to me.’[1]
[1] A. lynch: The Case Against Einstein, p.258. EINSTEIN'S SPECIAL THEORY OF RELATIVITY
‘There was a young lady named Bright.
Whose speed was far faster than light.
She went out one day, in a relative way
And returned on the previous night.[1]
[1] Reginald Butler (1913) quoted by Al Kelly in the introduction to his book Challenging Modern Physics – Questioning Einstein’s Relativity Theories. Brown Walker Press, Boca Raton, Florida, USA, 2005. 
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