The cosmological principle states that any observer in any galaxy will see the same general features of the Universe.

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The cosmological principle is a fundamental assumption underlying modern cosmology, and it states that the Universe is homogeneous and isotropic on large scales. This means that the overall distribution of matter and the large-scale structure of the Universe should look the same to any observer, regardless of their position or motion. While there may be small differences in observations due to local effects, the general features of the Universe should be the same for everyone.

The Cosmological Principle States That Any Observer in Any Galaxy