First Measurements of Hydrogen Absorption in the Spectrum of a Radio Source
notes: label: Description
content: Paper graph showing hydrogen absorption in the spectrum of a radio source, obtained with the 50-foot radio telescope at the Naval Research Laboratory in Washington, D.C.
label: Description
content: Ref: John Peter Hagen, A. Edward Lilley, and Edward F. McClain, "Absorption of 21-CM Radiation by Interstellar Hydrogen," <i>The Astrophysical Journal</i> 122 (Nov. 1955): 361-374.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.325761
label: catalog number
content: 325761
label: accession number
content: 257196
objectType: label: Object Name
content: graph
physicalDescription: label: Measurements
content: overall: 9 1/2 in x 12 in; 24.13 cm x 30.48 cm