LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – MATHEMATICS
THIRD SEMESTER – NOVEMBER 2012
MT 3502/5503 – ASTRONOMY
Date : 05/11/2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
Answer all questions: (10 x 2 = 20)
- What are cardinal points?
- Define Zenith and Nadir.
- Define Aberration of a celestial body.
- What is the use of a Gnomon?
- Define sidereal year.
- Define dynamical mean sun.
- Define an umbra.
- What is Harvest Moon?
- What are the chief elements present in sun?
- Define chromosphere.
PART – B
Answer any five questions: (5 X 8 = 40)
- Write a note on the equatorial system of coordinates.
- Trace the variations in the duration of day and night in a place of latitude 5N.
- Derive the tangent formula for refraction.
- Find an analytical expression for the equation of time.
- What are Astronomical seasons? Find their duration.
- Give a brief description of the surface structure of moon.
- Explain how solar and lunar eclipses are caused?
- Write a note on comets.
PART – C
Answer any two questions: (2 X 20 = 40)
- (i) What is Twilight? Find the number of days that twilight may last throughout night
in a given place.
(ii) Write a note on Morning stars, Evening stars and Circumpolar stars.
- (i) Explain any one astronomical instrument with a neat diagram.
(ii) Write a note on the different types of Calendar.
- (i) Describe the successive phases of moon with a neat diagram.
(ii) Find the maximum number of eclipses possible in a year.
- (i) Describe any two planets of the solar system.
(ii) Write a note on any four constellations visible over Chennai.
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