universe & solar system section 13 Practice Questions Answers Test with Solutions & More Shortcuts

Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]

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universe & solar system section 13

Question : 1 [UPPCS (Mains) 2004]

Unlike the fluid core of the Earth the core of the Moon is

a) Viscous liquid

b) Solid

c) Volatile gas

d) Plasma

Discuss »

Answer: (a)

Question : 2 [SSC CML (PRE) 2006]

Which planet looks reddish in the night sky ?

a) Mars

b) Mercury

c) Saturn

d) Jupiter

Discuss »

Answer: (a)

Mars is the fourth planet from the Sun and the seventh largest. The planet probably got this name due to its red color; Mars is sometimes referred to as the Red Planet as the iron oxide prevalent on its surface gives it a reddish appearance.

Question : 3 [NDA/NA 2016-I]

During solar eclipse

a) the moon comes exactly halfway between the earth and the sun.

b) the sun comes in between the earth and the moon.

c) the moon comes in between the sun and the earth.

d) the earth comes in between the sun and the moon.

Discuss »

Answer: (c)

Solar eclipse happens when the moon moves in front of the Sun as seen from a location on Earth.

Question : 4 [SSC CGLT 2010]

Which is the second nearest star to the Earth after the Sun?

a) Proxima Centauri

b) Alpha Centauri

c) Sirius

d) Vega

Discuss »

Answer: (a)

As the nearest star from our Solar System, Proxima Centauri is a prime candidate for future interstellar travel and space colonization missions. Proxima Centauri is a red dwarf star about 4.24 light-years distant inside the G-cloud in the constellation of Centaurus. It was discovered in 1915 by Robert Innes,

the Director of the Union Observatory in South Africa, and is the nearest known star to the Sun, although it is too faint to be seen with the naked eye. Because of the proximity of this star, its distance from the Sun and angular diameter can be measured directly, from which it can be determined that its diameter is about one-seventh of that of the Sun.

Proxima Centauri’s mass is about an eighth of the Sun’s, and its average density is about 40 times that of the Sun.

Question : 5

The earth is in aphelion on

a) Sept. 23

b) July 4

c) Dec. 22

d) June 21

Discuss »

Answer: (b)

The Earth is farthest from the sun at the Aphelion on July 4, when it is summer in the Northern Hemisphere.

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