Astronomy-Objective Related Question Answers

51. When the hydrogen in a star is depleted, its outer regions swell and redden such stars are called?

Red giants

52. The brightest star is?

Taurus

53. What does the colour of the star signify?

54. What are variable stars?

55. Which star is not seen to change its position in the sky?

Pole star

56. What are called as lighthouses in the sky?

Neutron stars

57. What is the colour of the young stars in the sky?

Blue

58. Where is the highest altitude of the star Polaris be observed?

Arctic Circle

59. Which star is cooler and many times brighter than Earth’s Sun?

Betelgeuse

60. Which is the brightest nebula visible in the night sky?

The Orion Nebula

61. Name the nebula, a cloud of dust and gases 5,000 light years away from Earth, where the coldest places in the Universe can be found?

The Boomerang Nebula. The “cold spot” has a temperature of -2730C (457.60F)

62. Which is the nearest planetary nebula to Earth?

The Halix Nebula (NGC 7293) lying about 450 light years away

63. What are the most distant objects in the universe found to date?

Quasars

64. By which name, the dying star that have expanded greatly from its original size and gives off red light are known?

Red Giant

65. Which is the nearest star cluster to our solar system?

Hyades cluster in the Taurus constellation. (The Bull). It’s about 150 million light years away.

66. The multi coloured lights that sweep across the sky in waves and are visible in the Antarctic region are called?

Aurora Australis

67. The part of the sun which is visible only during eclipses, as a remarkable silver pearly radiant glow around the sun?

Corona

68. Centre of our solar system?

Sun

69. Members of the solar system?

70. In which direction on the horizon does the Sun appear to rise on July 4 in New York State?

north of due east

71. No. of planets in the solar system?

Eight

72. The solar system moves with an average speed of?

250 km/sec

73. The largest body of the solar system?

Sun

74. The highest mountain of Mars is?

Nix Olympia

75. Parts of the Sun?

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