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| Paper: |
V. M. Slipher and the Development of the Nebular Spectrograph |
| Volume: |
471, Origins of the Expanding Universe: 1912-1932 |
| Page: |
135 |
| Authors: |
Thompson, L. A. |
| Abstract: |
Vesto Melvin Slipher was the first astronomer to clearly define the factors that
determine the “speed” of a nebular spectrograph. This brief historical summary
recounts the way these ideas developed and how Slipher's early work on galaxy
Doppler shifts was so quickly extended in the 1930s when Milton Humason and
Edwin Hubble at Mt. Wilson Observatory began to push the velocity-distance
relationship to such a depth that no one could doubt its cosmological
significance. |
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