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[edit]

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

Licensing[edit]

Public domain 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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current18:59, 10 March 2022Thumbnail for version as of 18:59, 10 March 2022367 × 224 (26 KB)DivermanAU (talk | contribs)tidy image
02:57, 17 November 2013Thumbnail for version as of 02:57, 17 November 2013367 × 224 (24 KB)Clarice Reis (talk | contribs)User created page with UploadWizard

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