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Astronomy (Objective) (Pages :11)
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61 Which is the nearest planetary nebula to Earth?

Ans : The Halix Nebula (NGC 7293) lying about 450 light years away
62 What are the most distant objects in the universe found to date?

Ans : Quasars
63 By which name, the dying star that have expanded greatly from its original size and gives off red light are known?

Ans : Red Giant
64 Which is the nearest star cluster to our solar system?

Ans : Hyades cluster in the Taurus constellation. (The Bull). It’s about 150 million light years away.
65 The multi coloured lights that sweep across the sky in waves and are visible in the Antarctic region are called?

Ans : Aurora Australis
66 The part of the sun which is visible only during eclipses, as a remarkable silver pearly radiant glow around the sun?

Ans : Corona
67 Centre of our solar system?

Ans : Sun
68 Members of the solar system?

(A) Planets

(B) satellites

(C) dwarf planets

(D) asteroids

(E) comets

Ans :()
69 In which direction on the horizon does the Sun appear to rise on July 4 in New York State?

Ans : north of due east
70 No. of planets in the solar system?

Ans : Eight
71 The solar system moves with an average speed of?

Ans : 250 km/sec
72 The largest body of the solar system?

Ans : Sun
73 The highest mountain of Mars is?

Ans : Nix Olympia
74 Parts of the Sun?

(A) Core

(B) photosphere

(C) chromosphere and corona

Ans :()
75 The region in the milkyway where the sun is situated?

Ans : Orion Arm
76 The visible part of the Sun’s surface is called?

Ans : Photosphere
77 Stream of protons blowing out of the corona and sweeping over the whole solar system is called?

Ans : Solar wind
78 Bright spots seen on the surface of the sun is called?

Ans : Plages
79 Dark spots seen on the surface of the sun is called?

Ans : Sunspot
80 The average temperature of the planets?

Ans : decreases with greater distance from the Sun
81 The inner planets in the solar system are?

(A) Mercury

(B) Venus

(C) Earth and Mars

Ans :()
82 The outer planets in the solar system?

(A) Jupiter

(B) Saturn

(C) Uranus and Neptune

Ans :()
83 The planet nearest to the sun?

Ans : Mercury
84 The smallest planet?

Ans : Mercury
85 Period of rotation of Mercury?

Ans : 58 days
86 Revolution period of Mercury?

Ans : 88 days
87 The most hostile planet is?

Ans : Mercury
88 Which two planets in the solar system do not have moons?

Ans : Mercury and Venus
89 In what way are the planets Mars, Mercury, and Earth similar?

Ans : They have elliptical orbits with the Sun at one focus.
90 The planet nearest to the Earth?

Ans : Venus

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