Space: Olbers' paradox (1823): why is the night sky dark? If t…

Question

Did you know? Olbers' paradox (1823): why is the night sky dark? If the universe were infinite and eternal, every line of sight would end on a star — the whole sky would be as bright as the Sun. The fact that it is dark was early evidence that the universe is finite in time AND had a beginning.

Accepted Answer

Olbers' paradox (1823): why is the night sky dark? If the universe were infinite and eternal, every line of sight would end on a star — the whole sky would be as bright as the Sun. The fact that it is dark was early evidence that the universe is finite in time AND had a beginning.

Olbers' paradox (1823): waarom is de nachtelijke hemel donker? Als het heelal oneindig en eeuwig zou zijn, zou elke kijklijn op een ster eindigen — de hele hemel zou even helder zijn als de zon. Het feit dat hij donker is, was een vroeg bewijs dat het heelal eindig is in tijd én een begin had.

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