great circle Comparison Table

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great circle comparison table

Subject has definition

hour circle A great circle passing through the celestial poles - i.e., perpendicular to the celestial equator.

meridian A great circle passing through the celestial poles and through the zenith of any location on Earth. For planetary observations a meridian is half the great circle passing through the planet's poles and through any location on the planet.

Subject	has definition
hour circle	A great circle passing through the celestial poles - i.e., perpendicular to the celestial equator.
meridian	A great circle passing through the celestial poles and through the zenith of any location on Earth. For planetary observations a meridian is half the great circle passing through the planet's poles and through any location on the planet.

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