Photo, Mt. Wilson Solar Observatory
An Active Prominence of the Sun, 140,000 Miles High, photographed July 9, 1917.
ASTRONOMY
The Science of the Heavenly Bodies
BY
DAVID TODD
Director Emeritus, Amherst College Observatory
Photo, Mt. Wilson Solar Observatory
An Active Prominence of the Sun, 140,000 Miles High, photographed July 9, 1917.
The Science of the Heavenly Bodies
BY
Director Emeritus, Amherst College Observatory