Insights Coordinate Dependent Statements in an Expanding Universe - Comments

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The discussion centers around a new PF Insights post by Greg Bernhardt, which explores coordinate dependent statements within the context of an expanding universe. Participants express appreciation for the thoroughness of the article, highlighting its value for those interested in cosmology. The post aims to clarify complex concepts related to the universe's expansion and the implications of different coordinate systems. Overall, the thread emphasizes the importance of understanding these concepts for aspiring cosmologists. Engaging with such material is crucial for grasping the intricacies of modern cosmology.
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Greg Bernhardt submitted a new PF Insights post

Coordinate Dependent Statements in an Expanding Universe
expandinguniverse.png


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Likes exmarine, junjunjun233, Drakkith and 5 others
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Very nice!
 
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Likes JohnNemo

Thread 'Estimates — True Size of the Universe?'

I always thought it was odd that we know dark energy expands our universe, and that we know it has been increasing over time, yet no one ever expressed a "true" size of the universe (not "observable" universe, the ENTIRE universe) by just reversing the process of expansion based on our understanding of its rate through history, to the point where everything would've been in an extremely small region. The more I've looked into it recently, I've come to find that it is due to that "inflation"...
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