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Astronomers Measure Star Heat

Pasadena, California: c. 1926 Astronomers Edison Pettiy, (L) and Seth Barnes Nicholson of the Mt. Wilson Observatory have made the first systematic infrared observations of celestial objects using a thermocouple and a galvanometer. NIcholson is observing the thermocouple while Pettit watches the galvanometer.
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Title:
Astronomers Measure Star Heat
Caption:
Pasadena, California: c. 1926 Astronomers Edison Pettiy, (L) and Seth Barnes Nicholson of the Mt. Wilson Observatory have made the first systematic infrared observations of celestial objects using a thermocouple and a galvanometer. NIcholson is observing the thermocouple while Pettit watches the galvanometer.
Credit:
Album / Universal Images Group / Underwood Archives/UIG
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Image size:
4800 x 3858 px | 53.0 MB
Print size:
40.6 x 32.7 cm | 16.0 x 12.9 in (300 dpi)
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