The renowned scientist suggested that instead of the Big Bang, the Universe was expanding continuously and eternally, a theory supported by the British physicist Fred Hoyle two decades later.
The Big Bang theory began to flourish when the American astronomer Edwin Hubble discovered in the 1920s that the universe expands. Since the Universe today is greater than yesterday, logic dictates that once in the history of was infinitesimally small, and therefore infinitely dense and active.
However, in the 1940s Hoyle argued that it would be mathematically acceptable a scenario in which the universe expands eternally, but keeps its density constant.
For that to happen, new matter needs to be created constantly in order to form new structures such as galaxies and stars that will be occupying the space. As the universe would be always infinite, its size will not vary with the expansion.
Exactly the same idea is described by Einstein in his manuscript: “To keep the density constant, new matter particles should be formed continuously,” he writes.
Although Einstein himself soon abandoned this idea and unfortunately for Hoyle did not ever published it, the dissatisfaction with the notion that the universe was created by a big bang is reflected in the same document, although this idea was fully compatible with his General theory of Relativity. The key behind this attitude was the belief of Einstein that the universe should be static and eternal, at least ostensibly.
The text was made available to the public who visited the archives of Albert Einstein in Jerusalem, but had inadvertently neglected, as it was classified as the earlier version of another publication.
The discovery was made by Irish physicist Cormac O’Raifeartaigh, who published the full text of the European Physical Journal.