File:1911 Britannica - Astronomy - Geometrical concepts.png
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1911_Britannica_-_Astronomy_-_Geometrical_concepts.png (367 × 224 pixels, file size: 26 KB, MIME type: image/png)
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Geometrical representation of astronomical orbit
Summary
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| Description |
English: Spherical or Geometrical Astronomy. The geometrical concepts. Here O is the origin, whatever point it may be; OZ is the fundamental axis passing through it. In order to represent in the figure the position of the fundamental plane, we conceive a circle to be drawn round O, lying in that plane. This circle, projected in perspective as an ellipse, is shown in the figure. OX is the fixed initial line by which directions are to be defined. Illustration from 1911 Encyclopædia Britannica, article Astronomy. |
| Date | |
| Source |
Encyclopædia Britannica Eleventh Edition, Vol. 2, Page 802  |
| Author | Encyclopædia Britannica, 1911 |
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 18:59, 10 March 2022 | | 367 × 224 (26 KB) | DivermanAU (talk | contribs) | tidy image |
| 02:57, 17 November 2013 |  | 367 × 224 (24 KB) | Clarice Reis (talk | contribs) | User created page with UploadWizard |
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