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Summary
| Description |
English: A drawing of the parallactic instrument built and used by Dutch astronomer Jacobus Kapteyn, used to analyze glass plate photographs of stars seen from the Southern hemisphere (South Africa, photos made by David Gill). Constructed around 1886, used to gather data for the Cape Photographic Durchmusterung. |
| Date | |
| Source | Gill D., Kapteyn J.C. (1875) Cape Photographic Durchmusterung |
| Author | Gill D., Kapteyn J.C. |
Licensing
|
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. |
| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:56, 12 February 2019 | | 1,063 × 709 (117 KB) | MarkMuseum | User created page with UploadWizard |
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