Question

The great circle which passes through both the celestial poles and the observer's Zenith and Nadir is called a __________________. *​

Answer 1

Answer:

Hour circle : Great circle passing through celestial poles is known as hour circle, also known as declination circle. Meridian : The hour circle passing through observer's zenith and nadir is known as (observer's) meridian. It represents the North-South direction at observer station.

Answer 2

Answer:

Hour circle

Explanation:

Great circle passing through celestial poles is known as hour circle, also known as declination circle. Meridian: The hour circle passing through observer's zenith and nadir is known as (observer's) meridian. It represents the North-South direction at observer station.