Universe And Solar System (World Geography) (Part-2)

Total Questions: 50

11. Which of these is a dwarf planet? [S.S.C. Online C.G.L (T-I) 1.09.2016 (Shift-II)]

Correct Answer: (c) Pluto
Solution:

Currently, there are officially five dwarf planets-

  1. Pluto,
  2. Haumea,
  3. Ceres,
  4. Makemake
  5. Eris.

Neptune is the planet, while Titan and Hydra are satellites related to Saturn and Pluto, respectively .

12. Which among the following is not a dwarf planet? [S.S.C. Online CHSL (T-I) 7.01.2017(Shift-III)]

Correct Answer: (a) Mars
Solution:

Mars is not a dwarf planet. It is one of the eight planets of the Solar System
Currently, there are officially five dwarf planets-

(1) Pluto,
(2) Haumea,
(3) Ceres,
(4) Makemake,
(5) Eris.

13. Which planet is also referred to as a "Dwarf planet"? [S.S.C. Online CHSL (T-I) 7.01.2017(Shift-I)]

Correct Answer: (a) Pluto
Solution:

Pluto is also referred to as a "Dwarf planet".

Definition (as per IAU – International Astronomical Union):

A dwarf planet:

  1. Orbits the Sun
  2. Has enough mass to be almost round in shape
  3. Has not cleared its orbit of other debris
  4. Is not a moon of another planet

Currently, there are officially five dwarf planets-

(1) Pluto,
(2) Haumea,
(3) Ceres,
(4) Makemake,
(5) Eris.

14. ________ is no longer considered a planet within Earth's Solar system. [S.S.C. Online CHSL (T-I) 12.10.2020 (Shift-III)]

Correct Answer: (d) Pluto
Solution:

Pluto is no longer considered a planet within Earth's Solar system. Pluto is considered as Dwarf Planet.

Definition (as per IAU – International Astronomical Union):

A dwarf planet:

  1. Orbits the Sun
  2. Has enough mass to be almost round in shape
  3. Has not cleared its orbit of other debris
  4. Is not a moon of another planet
Examples of Dwarf Planets:
NameLocationSpecial Fact
PlutoKuiper BeltOnce considered the 9th planet
ErisKuiper BeltSlightly smaller than Pluto, very dense
CeresAsteroid Belt (between Mars & Jupiter)First dwarf planet discovered
MakemakeKuiper BeltDiscovered after Pluto’s reclassification
HaumeaKuiper BeltOval-shaped due to fast rotation

15. Our solar system consists of how many planets? [S.S.C. Online MTS (T-I) 21.09.2017 (Shift-I)]

Correct Answer: (a) 8
Solution:

At present, the number of planets in our solar system is 8.

The 8 Planets (in order from the Sun):
OrderPlanetType
1MercuryTerrestrial
2VenusTerrestrial
3EarthTerrestrial
4MarsTerrestrial
5JupiterGas Giant
6SaturnGas Giant
7UranusIce Giant
8NeptuneIce Giant

16. Which planet is known as red planet? [S.S.C. Online CHSL (T-I) 10.01.2017(Shift-II)]

Correct Answer: (b) Mars
Solution:

Mars is also known as the 'Red Planet'.

Why is Mars called the Red Planet?
  • Mars appears reddish in color because its surface contains iron oxide (rust), which gives it a red appearance.
  • This reddish glow is visible even from Earth through telescopes.

The atmosphere of Mars is 95 percent carbon dioxide. It makes one revolution on its axis in about 24.6 hours and one revolution around the Sun in 686.98 days.

Facts about Mars:
  • It has the largest volcano in the solar system: Olympus Mons
  • It has two moons: Phobos and Deimos
  • Scientists believe liquid water once existed on its surface

17. Mercury is the planet from the Sun. [S.S.C. Online CHSL (T-I) 23.01.2017(Shift-II)]

Correct Answer: (a) 1
Solution:

Mercury is the first planet from the Sun.

The order of the planets according to their distance from the Sun is as follows -

  1. Mercury,
  2. Venus,
  3. Earth,
  4. Mars,
  5. Jupiter,
  6. Saturn,
  7. Uranus
  8. and Neptune.

18. What is the position of Venus from the sun among the eight planets? [S.S.C. Online MTS (T-I) 5.10.2017 (Shift-III)]

Correct Answer: (b) second
Solution:

Venus, the hottest planet in the solar system, is the second planet from the Sun.

The order of the planets according to their distance from the Sun is as follows -

  1. Mercury,
  2. Venus,
  3. Earth,
  4. Mars,
  5. Jupiter,
  6. Saturn,
  7. Uranus
  8. and Neptune.

19. What is the position of Earth from the Son among the eight planets? [S.S.C. Online MTS (T-I) 4.10.2017 (Shift-II)]

Correct Answer: (c) Third
Solution:

The position of the Earth from the sun is third. The order of the planets according to their distance from the Sun is as follows -

  1. Mercury,
  2. Venus,
  3. Earth,
  4. Mars,
  5. Jupiter,
  6. Saturn,
  7. Uranus
  8. and Neptune.

20. What is the position of Mercury from the sun among the eight planets? [S.S.C. Online MTS (T-I) 16.09.2017 (Shift-I)]

Correct Answer: (a) first
Solution:

Mercury is the first planet from the Sun. The order of the planets according to their distance from the Sun is as follows -

  1. Mercury,
  2. Venus,
  3. Earth,
  4. Mars,
  5. Jupiter,
  6. Saturn,
  7. Uranus
  8. Neptune.