“If the red shifts are a Doppler shift . . . The observations as they stand lead to the anomaly of a closed universe, curiously small and dense, and, it may be added, suspiciously young.
“On the other hand, if red shifts are not Doppler effects, these anomalies disappear and the region observed appears as a small, homogeneous, but insignificant portion of a universe extended indefinitely in both space and time.“
— Edwin Hubble, 1937 Royal Astronomical Society Monthly Notices
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2 comments
Feel free to reply to any comment by clicking the "Reply" button.We may reach to the truth if we don't try to visualise the universe in our mind. It will be beneficial if we put an analysis and then try to justify it by our sensory organs.
allmighty
Level 6
Aug 15, 2019
1
I'd be interested in his logic. Why do Doppler shifts 'lead to the anomaly of a closed universe'?
If i remember correctly, there was an essay in one of the appendices of Albert Einstein's famous book where he demonstrated that if the average density of the universe is anything greater than zero the universe must be finite or our night sky would be overwhelming bright.
I don't believe he took into account our visible horizon caused by things being too far away for the light to have enough time to reach us.
I love reading these kinds of analyses of the universe's nature by folks who are so much more qualified than I am. I'm an interested bystander even though I'm out of my depth pretty much from their first sentences.
RichCC
Level 8
Aug 15, 2019
0
Rich, think Doppler and sound. The anomaly is Doppler and light.
A bright sky is science fiction, not science.
@yvilletom Olber's paradox[en.wikipedia.org] explains why the night sky is not filled with stars. Actually while this stumped the astronomers of the day, it was Edger Allen Poe who came up with the correct answer!
starwatcher-al
Thanks. I was apparently thinking of Olber's paradox. I dug out my copy of Einstein's Relativity and found that I was mistaken -- he wasn't talking about light where I thought but rather the distribution of mass and a 'Quasi-Euclidian' universe. Ha, ha.
yvilletom
I have an idea of red-shift and the Doppler effect with respect to relative speed and implied distance. But I still have the same question -- how does that 'lead to the anomaly of a closed universe'?
And for that matter, what anomaly, specifically, are we talking about?
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