Exercise 25

Ex25-1 Define the following astronomical terms along with diagram:

(i) Zenith; (ii) Poles; (iii) Celestial Horizon; (iv) Celestial equator; (v) Ecliptic; (vi) Observers meridian; (vii) Declination circle; (viii) Equinoctial Colure; (ix) Right Ascension; (x) Hour Angle; (xi) Azimuth; (xii) Altitude.

Ex25-2 What is spherical triangle? Define its properties and tabulate the list of relations among different parameters of it.

Ex.25-3 Find the azimuth of a star at Roorkee (latitude of observer = 29° 52' N) when the declination of the star is 25° 15' N and hour angle 330°.

Ex.25-4 Find the azimuth of a star if its declination 12° 20' S and hour angle 330° N at a station having latitude 46° N

Ex.25-5 Determine the azimuth of the sun during sunrise at a place having latitude 40° 30' S. The declination of the sun is 25° 15' N.

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