An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : major axis
major axis
  آسه‌ی ِ مهین   
âse-ye mehin

Fr.: grand axe   

The greatest diameter of an ellipse; it passes through the two foci.

→ major; → axis.

semi-major axis
  آسه‌ی ِ نیمه‌مهین   
âse-ye nime-mehin

Fr.: demi grand axe   

Half the length of the major axis of an ellipse; a standard element used to describe an elliptical orbit. see orbital elements

→ semi-; → major; → axis.