BALOCHISTAN PUBLIC SERVICE COMMISSION

Samungli Road, Quetta Cantt.

COMBINED COMPETITIVE EXAMINATION FOR THE POSTS OF

BCMS/EB OFFICERS / SECTION OFFICERS B-17 IN THE S&GAD GOVT. OF BALOCHISTAN

ASTRONOMY

Time Allowed: 03 Hours

July 20, 2010 (09:30 AM)

Total Marks: [not clearly visible, likely 150]

Note: Attempt any Five questions. All questions carry equal marks.

Q-1. The Earth’s annual journey around the Sun makes our star appear to travel around the celestial sphere once in a year. This affects the visibility of the constellations. Explain with the help of diagram.

Q-2.

(a) Define Asteroid and describe theories of formation of Asteroid.

(b) Explain the physical properties of Asteroid.

Q-3. Off all stars in the sky, the Moon is the one that appears to undergo the most dramatic change. Explain with the help of diagram.

Q-4. Define the Laws of Refraction, and explain the refraction at the time of Sunset.

Q-5. Quasars or Quasi-stellar objects are the most powerful known energy sources in the Universe. Discuss.

Q-6. The Milky Way is just one galaxy among many, and other galaxies can be used as prototypes to help classify it. Explain in detail.

Q-7.

(a) Draw a diagram showing how the zodiacal light appears in relation to the sun.

(b) Discuss Nebulae and Star Clusters in detail.

Q-8. Write short notes on any five of the following:

(i) Circum Polar Stars

(ii) Astrophysics

(iii) Light Year

(iv) Red Shift

(v) Spectroscope

(vi) Big Bang

Good Luck

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