Universe And Solar System (Part-1)

31. Planetary scientists call the thin gaseous envelope around the Moon as the __ . [S.S.C. Online C.G.L. (T-I) 4 2020 (Shift-I)]

(a) lunar endosphere
(b) lunar thermosphere
(c) lunar exosphere
(d) lunar stratosphere

Correct Answer: (c) lunar exosphere

Solution:Planetary scientists call the thin gaseous envelope around the Moon as the 'Lunar exosphere'.

Here, molecules in the air are so few and far between, they rarely come into contact with one another.

Still, the gasses found around the Moon affects on conditions near the surface.

32. What is the other name for 'Orion Constellation'? [S.S.C. Online C.G.L. (T-I) 13.06.2019(Shift-I)]

(a) Piper
(b) Fighter
(c) Predator
(d) Hunter

Correct Answer: (d) Hunter

Solution:The Orion constellation is also called Hunter. The three major stars in it resemble the Orion belt, while Betelgeuse, the second brightest star in the constellation, forms Hunter's shoulder.

Constellation Orion | Information & Images

33. Which one of the following is the largest recognised constellation? [S.S.C. Online C.G.L. (T-I) 13.06.2019 (Shift-I)]

(a) Dorado
(b) Antila
(c) crux
(d) hydra

Correct Answer: (d) hydra

Solution:The Hydra constellation is the largest of the current 88 constellations in the sky.

34. The term 'Blood Moon' is used to refer to __ . [S.S.C. Online C.G.L. (T-I) 12.06.2019(Shift-II)]

(a) Crescent Moon
(b) Lunar Eclipse
(c) Full Moon
(d) Solar Eclipse

Correct Answer: (b) Lunar Eclipse

Solution:The term 'Blood Moon' is refers to Lunar Eclipse since the moon takes on a reddish tinge when it is fully eclipsed.

A lunar eclipse occurs when the moon travels through the umbra of the earth and blocks all direct sunlight.

35. About 70% of the sun is made up of [S.S.C. Online C.G.L. (T-I) 11.06.2019(Shift-III)]

(a) Helium
(b) Carbon
(c) Oxygen
(d) Hydrogen

Correct Answer: (d) Hydrogen

Solution:The Sun is the hottest glowing sphere of Plasma at the centre of the solar system. It is made of gasses and most of it is

hydrogen (about 70%) and helium (about 28%).

While carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of elements like neon, iron, silicon, magnesium and sulfur.

36. Which one of the following is the brightest star in the Orion Constellation? [S.S.C. Online C.G.L. (T-I) 10.06.2019(Shift-II)]

(a) Eta Orionis
(b) Betelgeuse
(c) Alnilam
(d) Rigel

Correct Answer: (d) Rigel

Solution:The brightest star in the Orion constellation is Rigel .

The Rigel star is a blue supergiant. It is at a distance of about 870 light years from the Sun.

37. On which of the following planet NASA sent the curiosity rover? [S.S.C. Online MTS (T-I) 6.08.2019 (Shift-I)]

(a) Jupiter
(b) Moon
(c) Mars
(d) Saturn

Correct Answer: (c) Mars

Solution:NASA has sent the Curiosity rover to Mars. This rover was launched by NASA in November 2011.

38. A body of frozen gases, rock and dust traveling in an elongated orbit around the Sun is called: [S.S.C. JE Mechanical Exams 27.10.2020 (Shift-II)]

(a) Satellite
(b) Comet
(c) Star
(d) Cape

Correct Answer: (b) Comet

Solution:A body of frozen gasses, rock, and dust traveling in an elongated orbit around the Sun is called a comet.

When a comet's orbit comes close to the sun, the ice in its central nucleus turns into gas that shoots out of the comet's sunlit side, carried by the solar wind outward to form a long tail.

39. A huge collection of gas, dust and billions of stars is called as: [S.S.C. JE Mechanical Exams 27.10.2020 (Shift-II)]

(a) Satellite
(b) Galaxy
(c) Planet
(d) Solar System

Correct Answer: (b) Galaxy

Solution:A huge collection of gas, dust and billions of stars is called a galaxy. Our solar system is part of the milky way galaxy. Millions of galaxies together make up the universe.

40. What is the radius of the moon? [S.S.C. Online CHSL (T-I) 19.03.2020 (Shift-I)]

(a) 1.74 x 10⁶m
(b) 1.79 x 10⁶m
(c) 1.78 x 10⁶m
(d) 1.74 x 10⁶m

Correct Answer: (d) 1.74 x 10⁶m

Solution:The radius of the moon is 1737.1 km or 1.74 x 10⁶m