Cosmology

What is the cosmological principle? What is Olber's paradox and how is it resolved? The cosmological principle is the working assumption that observers on Earth do not occupy an unusual or privileged location, instead it is assumed that the universe is homogenous and isotropic and sufficiently large. Or this principle assumes all observers no matter from where they look the universe looks the same. Obler’s Paradox is if one assumes that the universe is both static and infinite, than the sky at night should be clear and bright with no any dark patches. The sky should also be as bright and hot as the sun. No matter whether or not the universe is infinite, we see only the finite part of it from the earth. This resolves Obler’s Paradox.