Edwin Powell Hubble1920
Edwin Hubble and Frederick H. Seares publish a study of the colours of nebulous stars, using photometric evidence to investigate stars associated with nebular material.
United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.
Edwin Hubble and Frederick H. Seares publish a study of the colours of nebulous stars, using photometric evidence to investigate stars associated with nebular material.
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