The Moon takes just as long to rotate around its own axis as it does to revolve around the planet (Earth). How many other moons in the Solar System share this feature?

none
one
three
most of them
If the ro­ta­tion­al fre­quen­cy of satel­lite is larger than orbital fre­quen­cy, a small torque coun­ter­act­ing the rotation arises, even­tu­al­ly locking the fre­quen­cies in a tidal lock. Pluto and Charon are the extreme example, being locked to each other.

Answers distribution

none
one
three
most of them
answers
flagIndonesia
16%
0%
0%
83%
12
flagFinland
5%
0%
11%
82%
17
flagNew Zealand
18%
9%
0%
72%
11
flagthe United Arab Emirates
7%
21%
0%
64%
14
flagItaly
24%
6%
6%
62%
29
flagCanada
27%
6%
6%
55%
29
flagIndia
32%
11%
7%
46%
139
flagNorway
21%
28%
3%
46%
28
flagPakistan
27%
16%
11%
44%
18
flagPoland
30%
15%
9%
43%
8752
flagFrance
17%
30%
8%
43%
23
flagthe United Kingdom
36%
13%
7%
42%
257
flagGermany
28%
13%
11%
42%
111
flagDenmark
33%
16%
8%
41%
12
flagthe United States
34%
11%
11%
40%
342
flagUkraine
37%
18%
12%
31%
16
flagAustralia
35%
14%
21%
28%
14
flagthe Netherlands
52%
19%
4%
23%
21
flagthe Philippines
45%
18%
13%
22%
22
flagRepublic of Ireland
50%
16%
16%
16%
18

Gender

men46%
women42%
none
33%
30%
one
12%
16%
three
7%
9%
most of them
46%
42%

Details

Author: globalquiz.org
Illustration: Steve Jurvetson
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