Important Question and Answer about Solar System

1. Which of the following planets is known as ‘Morning Star’?
(1) Mercury (2) Venus (3) Mars (4) Jupiter (5) Saturn
Ans. (2) Venus

2. How many years does Pluto take in revolving round the sun?
(1) 110 years (2) 246 years (3) 248 years (4) 250 years
Ans. (3) 248 years

3. Comets are celestial bodies moving about the solar system in ----
(1) Elliptical or hyperbolic orbits, usually accompanied by a shining tail
(2) Elliptical orbits usually accompanied by a long shining tail
(3) Hyperbolic orbit always accompanied by a shining heads
(4) Hyperbolic orbit without projecting any tail or head
Ans. (3) Hyperbolic orbit always accompanied by a shining heads

4. The temperature of the Sun’s outer surface is ------
(1) 60, 00, 000 0C (2) 6, 000 0C (3) 60 0C (4) 0 0C
Ans. (2) 6, 000 0C

5. Which planet of the solar system spins on its axis at the fastest rate?
(1) Mercury (2) Earth (3) Jupiter (4) Saturn
Ans. (3) Jupiter

6. Which among the following four planets is the biggest in size?
(1) Mercury (2) Earth (3) Venus (4) Mars
Ans. (2) Earth

7. Among the planets of the solar system, the one which has the longest period of rotation is --- (1) Venus (2) Mars (3) Pluto (4) Saturn
Ans. (1) Venus

8. Which one of the following statements regarding Shooting Stars is incorrect?
(1) They are meteors
(2) They are the debris which got separated from a comet
(3) They emit light due to extremely high temperature caused by friction while they are passing through earth’s atmosphere
(4) They are a kind of a star
Ans. (1) They are meteors

9. Which planet is known as ‘Watery Planet’?
(1) Mercury (2) Earth (3) Jupiter (4) Mars
Ans. (2) Earth

10. Solar system was discovered by?
(1) Kepler (2) Galileo (3) Copernicus (4) Eratosthenes
Ans. (3) Copernicus

11. Huge congregations of stars that are held together by the force of gravity are known as? (1) Constellations (2) Solar systems (3) Galaxies (4) Comets
Ans. (3) Galaxies

12. The unit of measuring distances between the stars is known as?
1)Galactic unit (2)Cosmic kilometer(3)Stellar mile (4)Light Year
Ans. (4) Light Year

13. Even though Pluto is usually the farthest planet, its path is highly elliptical, crossing inside the path of some other planets. As a result, for a period of twenty years from 1979 the farthest planet is not Pluto but?
1) Uranus (2) Saturn (3) Neptune (4) Jupiter
Ans. (3) Neptune

14. Which planet looks reddish in the night sky?
(1) Mercury (2) Mars (3) Jupiter (4) Saturn
Ans. (2) Mars