Olber’s paradox

Olber’s paradox

If the Universe filled with infinitely many stars for an also infinite time, it sounded reasonable that no night could exist, as heavens would be bright by other stars even when our Sun disappeared into horizon. So Olber’s paradox is the paradox between this theory of an infinite old universe with stars scattered more or less randomly throughout infinite space and the practice of dark night.

Newton thought that the universe had to be a static, infinitely old, unlimited expanse of stars homogeneously distributed. This model effectively resolved the otherwise problematic appearance of a privilege centre of gravity -in a non homogenous universe large gravitational forces would not be compensated at all- but failed to solve the riddle of the sky darkness.

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