* It challenged the prevailing view: The prevailing view at the time was a static universe, with no expansion or contraction. Hubble's theory was a radical departure from this.
* The evidence wasn't initially conclusive: Hubble's initial measurements were based on limited data and had some uncertainties. Some scientists argued that the observed redshift in galaxies could be due to other factors besides expansion.
* The implications were profound: Accepting an expanding universe meant accepting the Big Bang theory, which had its own set of challenges and implications for our understanding of the universe's origin and evolution.
Here's a timeline of how acceptance grew:
* 1920s: Hubble's initial observations and papers on the redshift-distance relationship were met with skepticism from many astronomers.
* 1930s: More evidence and refined measurements started to sway some scientists. However, many still held on to the idea of a static universe.
* 1940s-1950s: The development of the Big Bang theory and further observational evidence strengthened the case for an expanding universe. However, some alternative theories persisted.
* 1960s: The discovery of the cosmic microwave background radiation, a direct prediction of the Big Bang theory, finally provided definitive evidence for an expanding universe.
By the late 1960s, the expanding universe had become the dominant model in cosmology. However, it's important to note that even today, there are still some scientists who question the details of the Big Bang and the expansion of the universe.
In short, Hubble's theory was not immediately accepted, but over time, the evidence and its theoretical implications convinced the scientific community of its validity.
