Edwin Powell Hubble1916
Hubble publishes a detailed study of the variable nebula NGC 2261, documenting changes in its appearance and establishing the object as an important example of a nebula with observable variability.
United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.
Hubble publishes a detailed study of the variable nebula NGC 2261, documenting changes in its appearance and establishing the object as an important example of a nebula with observable variability.
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