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Astronomy and Cosmology
Cosmology
Georges Lemaître primeval atom
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[QUOTE="Bandersnatch, post: 6382048, member: 399360"] Lemaitre - and Friedmann, and Robertson, and Walker - were all studying Einstein Field Equations. The solution to which, arrived at under some assumptions best resembling the observed universe, has a singularity in the past. That's Lemaitre's primeval atom. As the universe gets closer to the singularity (i.e. as we extrapolate to the past), the scale factor goes to zero - that's the meaning of very small. I.e. he didn't suppose much about the result, just saw what the equations told him and dressed it in words - perhaps inflected by his priestly circumstances. I don't know what was thought of the (in)finiteness of the universe at the time, but the solution accommodates both finite and infinite cases. [/QUOTE]
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Astronomy and Cosmology
Cosmology
Georges Lemaître primeval atom
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