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What part of the Moon surface had been known to humanity before the first photos of the dark side were taken in 1959?

52%

59%

81%

100%

Moon's libration changes the angle from which the Moon is seen, allowing about 59% of its surface to be seen from the Earth (but only half at any instant). Moon's libration is caused by the eccentricity of its orbit around Earth and by a slight inclination of its axis of rotation.

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Answers by country

Singapore

26%

66%

6%

0%

15

South Africa

38%

57%

0%

0%

21

France

33%

55%

3%

3%

27

Poland

34%

53%

7%

3%

20024

the United Kingdom

33%

50%

9%

5%

335

New Zealand

35%

50%

3%

7%

28

Malaysia

27%

50%

0%

5%

18

the Philippines

36%

46%

10%

6%

99

the Netherlands

52%

44%

4%

0%

25

India

39%

43%

10%

5%

972

Germany

44%

43%

8%

4%

74

Republic of Ireland

40%

42%

15%

2%

40

Greece

52%

42%

5%

0%

19

the United Arab Emirates

51%

40%

0%

8%

35

the United States

42%

39%

9%

4%

828

Australia

41%

38%

11%

6%

78

Pakistan

52%

38%

5%

3%

55

Unknown

37%

37%

17%

7%

40

Nigeria

44%

33%

11%

5%

18

Canada

57%

28%

9%

2%

71

Which astronomical discovery was nicknamed 'Little Green Man'?

This is the aurora of Jupiter. What are the visible bright spots caused by?

atmospheric storms

multiple magnetic poles of Jupiter

This unique line of about 20 stars is known as ...

Kemble's cascade

What kind of 'natural disasters' happen on the moon?

volcanic eruptions