Mention605708

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so:text If we put in the details, the singularities of the field, viz. the galactic systems and the stars, we find that there is... a tendency, called gravitation, to decrease the mutual distances of these "singularities." At short distances, within the confines of a galactic system, this second tendency is by far the strongest, and the galactic systems retain their size independent of the expansion or contraction of the universe... (en)
so:isPartOf https://en.wikiquote.org/wiki/Willem_de_Sitter
so:description Kosmos (1932) (en)
so:description Above is Beginning Quote of the Last Chapter: Relativity and Modern Theories of the Universe==== --X (en)
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