Sujet
Astronomers Measure Star Heat
Légende
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.
Crédit
Photo12/Underwood Archives/UIG
Notre référence
UMG20A12_410
Model release
Non
Property release
NA
Licence
Droits gérés
Format disponible
53,0Mo (8,8Mo) / 40,6cm x 32,7cm / 4800 x 3858 (300dpi)