On Einstein and the Expansion of the Universe

Einstein's field equations for general relativity predict a singularity. He did not believe that a big bang began the Universe though La Maitre told him of the theory derived from Einstein’s equations. Logically in a static Universe gravity should contract everything to one point. Einstein didn't like that idea so he added a small, constant anti-gravity energy to neutralize inward force of the general gravitational field of the Universe and keep it steady.

According to the wikipedia article below, Einstein addition of a cosmological constant was made to counteract the fact that his field equations of general relativity led to a Universe that would eventually contract under the influence of gravity if it were static. Einstein and other scientists believed then that the Universe was static. As recently as the 1960's the steady state theory of Fred Hoyle had believers.

The introduction of a slight cosmological constant force to counter gravity's force to contract the Universe does seems uncharacteristically unscientifically illogical for Einstein. Yet Einstein had such confidence in the accuracy of his theory he could infer the existence of an unknown anti-gravity energy to balance out the mass array of the universe. That took inductive logic from the general theory equations and the manifest Universe about as far as one could go at the time.

The universe since 2000 has been observed to be increasing its rate of expansion apparently-yet there are many theories about that.

The expansion may have started about the year of the Universe 7 billion and is increasing its pace perhaps leading to too fast of expansion and a big rip in a few billion years. Quantum theory predications of a constant are too high of a value, and the observed constant value is hard to explain. Dark energy driving the expansion is inexplicable presently, yet cosmology is in a difficult point of running into unknown and difficult to solve large question presently. Its unfortunate Einstein isn't around to solve them.

http://en.wikipedia.org/wiki/Cosmological_constant

Knowledge generally of what’s out there is expanding. Einstein had no idea that the universe is expanding. Quantum theory has far too powerful of a dark energy hypothetically-120 powers of ten greater than what is observed-so it can't be right either. It could be that space or dimensions are expanding instead of energy, or that quantum particles-string-membranes dump their energy in other dimensions etc. It could be numerous things that fine-tune the Universe so it is as it is.

That’s the fascinating part about cosmological theories-there are so many of them.