51.
Among the following which planet takes maximum time for one revolution around the Sun?

52.
The only planet whose period of rotation is longer than the period of revolution around the Sun?

53.
The planet with the maximum number of satellites is ________.

54.
The outermost layer of Sun is called ________

55.
Which of the following celestial bodies is located farthermost to the Earth?

56.
In how many parts the shadow of Earth is divided during solar or lunar eclipse?

57.
Which one of the following is correct?
Great Bear is a ________

58.
In astrophysics, what is the name of hole in outer space which emits stars and energy?

59.
The Srnith-tuttle comet will crash with Earth in ________

60.
Which is the nearest planet to Sun?

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