Did Hubble opine that the universe was expanding?

In summary, Edwin Hubble's groundbreaking research on the redshift of galaxies and their separation velocity sparked a debate about whether space itself was expanding or if there was a fixed framework in which everything was moving apart. Hubble and his colleague, Humason, did not provide a definitive answer and left the interpretation of their data to others. Hubble himself was hesitant to fully accept the idea of an expanding universe, but his work ultimately played a crucial role in shaping our understanding of the cosmos.
  • #1
CCWilson
63
0
When Hubble published that the galaxies were moving away from each other, the further away the greater redshift and the greater separation velocity, was he saying that space itself was expanding, on the basis of Einstein's general theory, or was he assuming a more or less fixed space, with everything in it retreating from everything else? In other words, did he come up with the idea of an expanding universe - as opposed to a fixed framework within which all the players were flying apart - or did someone else draw that conclusion as a result of his observations?
 
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  • #2
Hubble and Humason did not say that redshifted “nebulae” were receding from us. They left the interpretation of their data to others. See this quotation:

“Mr. Humason and I are both deeply sensible of your gracious appreciation of the papers on velocities and distances of nebulae. We use the term ‘apparent’ velocities to emphasize the empirical features of the correlation. The interpretation, we feel, should be left to you and the very few others who are competent to discuss the matter with authority.”
http://en.wikipedia.org/wiki/Edwin_Hubble

One more example of historical evidence, written by Hubble himself, is here:
http://apod.nasa.gov/diamond_jubilee/d_1996/hub_1929.html
 
  • #3
Yes, Hubble was reluctant to conclude his redshift studies suggested the universe was expanding. He questioned, but, never entirely rejected that interpretation for most of his life.
 
  • #4
'Opine'? Man, somebody must have gotten a thesaurus for Christmas...
 
  • #5
Admittedly, I am a logolept.
 

Related to Did Hubble opine that the universe was expanding?

1. Did Hubble actually believe that the universe was expanding?

Yes, Hubble was one of the first scientists to propose the theory of the expanding universe. His observations of galaxies moving away from each other provided evidence for this idea.

2. How did Hubble come to this conclusion?

Hubble studied the light spectra of distant galaxies and noticed that they were all redshifted, meaning their light was stretched to longer wavelengths. This indicated that the galaxies were moving away from each other and the universe was expanding.

3. Was Hubble the only scientist to propose this theory?

No, Hubble's theory was based on the work of other scientists such as Georges Lemaître and Albert Einstein. However, Hubble's observations and calculations were crucial in solidifying the idea of an expanding universe.

4. How has Hubble's theory of the expanding universe been proven?

Hubble's theory has been proven through various observations, including the cosmic microwave background radiation and the measurement of the Hubble constant. These and other pieces of evidence support the idea that the universe is indeed expanding.

5. Does Hubble's theory of an expanding universe still hold true today?

Yes, Hubble's theory is still widely accepted by the scientific community and is supported by ongoing observations and research. However, there are still many unanswered questions about the exact nature and rate of the expansion of the universe.

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