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IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections.
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https://iiif.si.eduView ManifestView in Mirador ViewerUsage Conditions May ApplyUsage Conditions ApplyThere are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page.
IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections.
More -
https://iiif.si.eduView ManifestView in Mirador ViewerUsage Conditions May ApplyUsage Conditions ApplyThere are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page.
IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections.
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This is one of several diffraction gratings used on the the prime focus spectrograph of the 200-inch Hale Telescope at Palomar operated by the California Institute of Technology. The prime focus spectrograph, also called the nebular spectrograph, was designed and built at Caltech in the late 1940's for installation on the then-new Hale Telescope. Its original configuration used two prisms as dispersers, but in 1951 it was refitted for diffraction gratings, many of which were produced by the Babcocks in the Mount Wilson shops. The overall system was designed by Rudolph Minkowski and was used by him, as well as by Edwin Hubble, Allan Sandage, Maartin Schmidt and Jesse Greenstein, among many other prominent astronomers. The instrument remained in use continually from 1951 through 1973, providing a wealth of data on the redshift of distant galaxies, on white dwarf stars, and on the nature of radio galaxies, found to be optically stellar and hence called quasi-stellar radio sources, or quasars.
This instrument assembly was donated to NASM by the California Institute of Technology in 1998. In the accesison process, the Museum conducted video interviews with two astronomers who had intimate knowledge of the device.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin
United States of America
Type
INSTRUMENTS-Scientific
Manufacturer
California Institute of Technology Dimensions
3-D: 12.5 × 2.5 × 13.2cm (4 15/16 × 1 × 5 3/16 in.) Materials
Overall - wooden box with glass grating with Plexiglass cover.
A19980111000A, Wooden Case: Wood, Plexiglas, Rubber, Adhesive, Steel, Ink, Graphite, Varnish Inventory Number
A19980111000
Credit Line
Gift of the California Institute of Technology Palomar Observatory. No restrictions.
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
For more information, visit the Smithsonians Terms of Use.