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
flagFinland
3%
0%
7%
89%
28
flagIndonesia
23%
0%
0%
76%
13
flagthe United Arab Emirates
5%
15%
0%
75%
20
flagItaly
28%
6%
9%
56%
32
flagCanada
25%
9%
6%
54%
31
flagGermany
25%
12%
11%
47%
133
flagIndia
32%
12%
7%
45%
172
flagPoland
30%
15%
9%
44%
9716
flagNorway
24%
27%
3%
44%
29
flagPakistan
27%
16%
11%
44%
18
flagthe United Kingdom
33%
14%
8%
43%
312
flagDenmark
35%
14%
7%
42%
14
flagthe United States
34%
11%
11%
40%
362
flagFrance
14%
33%
11%
40%
27
flagthe Netherlands
41%
20%
3%
34%
29
flagUkraine
37%
18%
12%
31%
16
flagUnknown
44%
16%
9%
30%
43
flagAustralia
35%
14%
21%
28%
14
flagthe Philippines
40%
20%
12%
24%
25
flagRepublic of Ireland
50%
16%
12%
20%
24

Gender

men46%
women44%
none
33%
29%
one
12%
16%
three
7%
9%
most of them
46%
44%

Details

Author: globalquiz.org
Illustration: Steve Jurvetson
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