Olbers' paradox states that if the universe is infinite and static with stars evenly distributed, then any direction we look should show a bright star. However, observation of the night sky reveals that this is not true, posing an apparent contradiction between assumption and reality.
The explanation for the supposed paradox lies in the fact that, due to the principle of subjectivity described here, which limits the observation of the universe to a maximum radius beyond which information does not reach us, in a manner compatible with Mach's principle.

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