Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.

the great circle

plural great circles

A great circle is a special circle at the surface of a sphere (for example of a planet or of the sky). You can recognize a great circle by any of the following attributes:

Some examples of great circles are: the ecliptic, the equator, any meridian.