Forfatter/Opretter:
Kredit:
This image is available from the United States Library of Congress's Prints and Photographs division
under the digital ID hec.04702.
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
størrelse:
1024 x 766 Pixel (90886 Bytes)
beskrivelse:
Charles Greeley Abbot, astrophysicist and Secretary of the Smithsonian, with his device: a silver-disc pyrheliometer which measures direct beam solar irradiance
Licens:
Public domain

Yderligere oplysninger om licens til billedet kan findes her. Sidste ændring: Sat, 10 Aug 2024 12:21:57 GMT