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DyLEMaty / Odp: Właśnie (lub dawniej) przeczytałem...
« dnia: Stycznia 11, 2021, 07:18:35 pm »Pierwszy to "Eureka", z podtytułem "A Prose Poem", Poego, przedziwny tekst pisany nie wiedzieć: serio czy dla jaj, łączący kpiny ze znanych filozofów, teologizowanie i wcale trafne intuicje fizyczno-kosmologiczne:It has been always either directly or indirectly assumed — at least since the dawn of intelligible Astronomy — that, were it possible for us to attain any given point in space, we should still find, on all sides of us, an interminable succession of stars. This was the untenable idea of Pascal when making perhaps the most successful attempt ever made, at periphrasing the conception for which we struggle in the word “Universe.” “It is a sphere,” he says, “of which the centre is everywhere, the circumference, nowhere.” But although this intended definition is, in fact, no definition of the Universe of stars, we may accept it, with some mental reservation, as a definition (rigorous enough for all practical purposes) of the Universe proper — that is to say, of the Universe of space. This latter, then, let us regard as “a sphere of which the centre is everywhere, the circumference nowhere.”
https://www.eapoe.org/works/editions/eurekac.htm
https://en.wikipedia.org/wiki/Eureka:_A_Prose_Poem
Blaise Pascal. XVII wiek. Cóż za przenikliwość!
Z dzisiejszego punktu widzenia ideę Pascala chyba nie można już nazwać "untenable". W każdym razie niezupełnie. Bo sfera o podobnych właściwościach jest do pomyślenia, i taki model kosmologiczny wchodzi w rachubę:
Increase all dimensions by one, and you have the situation that may apply to us: the universe as a four-dimensional hypersphere with no center and no edge, and nothing beyond. Why do all the galaxies seem to be running away from us? The hypersphere is expanding from a point, like a four-dimensional balloon being inflated, creating in every instant more space in the universe. Sometime after the expansion begins, galaxies condense and are carried outward on the surface of the hypersphere. There are astronomers in each galaxy, and the light they see is also trapped on the curved surface of the hypersphere. As the sphere expands, an astronomer in any galaxy will think all the other galaxies are running away from him. There are no privileged reference frames. The farther away the galaxy, the faster its recession. The galaxies are embedded in, attached to space, and the fabric of space is expanding.
(Carl Sagan, "Kosmos", 1980)