You searched for: “axes”
Word Entries containing the term: “axes”
axis (s) (noun), axes axiis (pl)
An imaginary or theoretical line around the middle of something: A planet rotates, turns, or spins around its own axis.
This entry is located in the following unit: Astronomy and related astronomical terms (page 4)
semi-major axis, semimajor axis (s) (noun), semi-major axes; semimajor axes (pl)
Half the length of the major axis of an ellipse: A Semi-major axis is a standard element used to describe an elliptical orbit.

In other words, a semi-major axis is,half of the larger diameter of an ellipse.

Half of the smaller diameter is the semi-minor axis.

This entry is located in the following unit: Astronomy and related astronomical terms (page 23)