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%
91
flagVietnam
3%
96%
0%
0%
27
flagItaly
8%
83%
6%
1%
80
flagSpain
13%
80%
3%
3%
30
flagthe United Arab Emirates
16%
75%
3%
5%
56
flagNew Zealand
16%
75%
0%
4%
24
flagGreece
25%
75%
0%
0%
24
flagFrance
24%
72%
0%
4%
50
flagthe Netherlands
20%
70%
6%
1%
81
flagGermany
25%
67%
4%
2%
268
flagRepublic of Ireland
19%
65%
9%
4%
41
flagthe United Kingdom
24%
63%
7%
3%
545
flagPoland
27%
61%
7%
3%
16051
flagthe United States
35%
50%
8%
3%
595
flagIndia
35%
50%
11%
2%
281
flagthe Philippines
28%
44%
21%
2%
38
flagUnknown
44%
43%
6%
4%
713
flagCanada
41%
41%
11%
3%
51
flagNorway
48%
37%
8%
5%
37
flagAustralia
31%
37%
13%
13%
29

Gender

men61%
women65%
50%
28%
24%
59%
61%
65%
80%
6%
7%
100%
3%
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?
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