In the 1920s this American astronomer provided the earliest evidence that the universe was expanding
In the face of Hubble's evidence, Einstein was also forced to abandon his... [DOC] [TLE] Edwin Powell Hubble: Biography - Space.com [PAR] May 12, 2012 ... [See also our overview of Famous Astronomers and great scientists from many ... 
Edwin Hubble, credited with the discovery of the expansion of the ...