What is it about?
It appears that the Universe establishes a fixed of frame of reference and that we merely move within it, relative to it, and that all of our physical laws are constrained by its existence. But that is actually not the case. Instead, each observer has their own frame of reference, which is not at all fixed relative to all the others. The Universe appears fixed to us only with respect to our own locally defined free-falling frame.
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Why is it important?
This paper resolves a debate between those who argue that special relativity needs to be modified to account for the Universe's fixed frame, and those who believe that there is no violation of Einstein's special relativity postulate. Since the Universe does not itself actually possess a fixed frame, the issue is simply non-existent.
Read the Original
This page is a summary of: The Seemingly Preferred Cosmic Frame, Physica Scripta, February 2022, Institute of Physics Publishing, DOI: 10.1088/1402-4896/ac5666.
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