Did Einstein believe anti-gravity was possible on Earth?
Einstein viewed anti-gravity as a repulsive force that prevented the universe from collapsing. He did not publish his views as to whether anti-gravity was possible on earth! However, after publishing his General Theory of Relativity in 1915, Einstein explored the consequences of his gravitational field equation. G = 8πT In a paper titled ‘Kosmologische Betrachtungen zur allgemeinen Relativitatsctheorie’ (Cosmological Considerations on the General Theory of Relativity) published in 1917, Einstein found that to model a steady state universe, which was the then favoured model, he had to bastardise his field equation into the parameterised form: – G(μν) – λg(μν) = -κ(T(μν) – ½g(μν)T) Where the constant(?) ‘λ’ is the cosmological constant or a ‘fudge factor’ that Einstein introduced to make his field equation work for a steady state universe. When Edwin Hubble discovered, in 1925, that the universe was expanding, Einstein commented that this constant was the greatest blunder of his life. It
