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
9%
82%
6%
1%
82
flagGreece
17%
80%
2%
0%
35
flagSpain
15%
78%
3%
3%
33
flagthe United Arab Emirates
16%
75%
3%
4%
61
flagFrance
23%
72%
0%
3%
51
flagthe Netherlands
23%
69%
5%
1%
95
flagGermany
26%
66%
3%
2%
306
flagSweden
17%
65%
13%
3%
29
flagthe United Kingdom
24%
63%
7%
3%
593
flagRepublic of Ireland
22%
63%
9%
4%
44
flagPoland
26%
62%
6%
2%
19318
flagthe United States
34%
51%
8%
3%
616
flagUnknown
39%
50%
6%
4%
1268
flagIndia
36%
49%
10%
1%
301
flagAustralia
27%
45%
13%
10%
37
flagthe Philippines
29%
43%
21%
2%
41
flagCanada
41%
41%
11%
3%
51
flagNorway
47%
37%
10%
5%
40

Gender

men62%
women66%
50%
27%
23%
59%
62%
66%
80%
6%
7%
100%
3%
2%

Language versions

question
answers
results
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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?
1544
48%

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