The Fine-Tuning Of The Universe For Life

  title={The Fine-Tuning Of The Universe For Life},
  author={Luke A. Barnes},
  journal={The Routledge Companion to Philosophy of Physics},
  • L. Barnes
  • Published 11 August 2021
  • Physics
  • The Routledge Companion to Philosophy of Physics
When a physicist says that a theory is fine-tuned, they mean that it must make a suspiciously precise assumption in order to explain a certain observation. This is evidence that the theory is deficient or incomplete. As a simple example, consider a geocentric model of the Solar System. Naively, at any particular time, the Sun and planets could be anywhere in their orbits around the Earth. However, in our night sky, Mercury is never observed to be more than 28◦ from the Sun, and Venus is never… 
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