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Constituents Of Universe - Questions and Answers

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16. Which one of the following is not a unit of time
A. light year
B. leap year
C. microsecond
D. lunar month
Explanation:
17. The model of solar system according to which, the Sun is at rest, was first proposed by
A. Kepler
B. Hubble
C. Copernicus
D. Newton
Explanation:
18. The period of rotation of the Sun is
A. 34 days
B. 25 days
C. 25 days at pole and 34 days at the equator
D. 34 days at the pole and 25 days at the equator
Explanation:
19. According to geocentric model of planetary motion
A. earth is stationary
B. the Sun is stationary
C. planets are stationary
D. earth is moving around the Sun
Explanation:
20. A large group of stars is called a
A. sign of zodiac
B. constellation
C. galaxy
D. universe
Explanation:
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