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

50%
59%
80%
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.

Answers distribution

50%
59%
80%
100%
answers
flagFinland
0%
100%
0%
0%
77
flagVietnam
3%
96%
0%
0%
27
flagItaly
9%
83%
6%
1%
77
flagSpain
10%
82%
3%
3%
29
flagNew Zealand
16%
75%
0%
4%
24
flagthe United Arab Emirates
18%
72%
4%
6%
50
flagFrance
24%
72%
0%
4%
50
flagGermany
23%
68%
4%
2%
245
flagthe Netherlands
23%
66%
7%
1%
65
flagthe United Kingdom
24%
63%
7%
3%
493
flagRepublic of Ireland
21%
63%
10%
5%
38
flagPoland
26%
62%
7%
2%
13468
flagSwitzerland
30%
60%
0%
5%
20
flagthe United States
35%
50%
8%
3%
570
flagIndia
35%
49%
10%
1%
273
flagUnknown
47%
45%
3%
2%
107
flagthe Philippines
29%
43%
21%
2%
37
flagCanada
42%
40%
12%
4%
50
flagNorway
43%
40%
9%
6%
32
flagAustralia
37%
29%
16%
12%
24

Gender

men67%
women66%
50%
23%
23%
59%
67%
66%
80%
5%
7%
100%
2%
2%

Language versions

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answers
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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?
1395
47%

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