Is any part of the universe really "flat" on a large scale? - by Earl Wajenberg - Quora Question Review
This document contains a review of the answer by Earl Wajenberg on the question in Quora: "Is any part of the universe really "flat" on a large scale?"
To order to read all the answers select:
https://www.quora.com/Is-any-part-of-the-universe-really-flat-on-a-large-scale
- The text in italics is copied from the article.
- Immediate followed by some comments
Contents
Reflection
1. Answer Review
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As far as we can presently tell, the overall geometry of the universe is flat.
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How is that established?
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Clusters of galaxies are organized into long filaments, between which are voids containing very little matter.
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The geometry there must be very close to large-scale flat, with no mass near to alter it.
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Reflection 1 - Question Review: Is any part of the universe really "flat" on a large scale?
To answer this question requires a definition of what means "flat".
Any way the question is not clear, specific the words: "on a large scale."
A simpler question would be:
- Are there areas in the Universe which are flat?
- Are there areas in the Universe which are not flat?
- What is the physical difference.
The 'problem' is that none of these questions can be answered.
The same reasoning exists with the question: Is the universe, or any part of the universe curved.
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Created: 23 May 2024
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