Edwin Powell Hubble1932
Hubble publishes a technical study of the surface brightness of threshold photographic images, improving methods used to estimate the magnitudes of faint nebulae from photographic plates.
United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.
Hubble publishes a technical study of the surface brightness of threshold photographic images, improving methods used to estimate the magnitudes of faint nebulae from photographic plates.
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