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
4%
0%
9%
86%
22
flagIndonesia
16%
0%
0%
83%
12
flagthe United Arab Emirates
5%
15%
0%
73%
19
flagItaly
24%
6%
6%
62%
29
flagCanada
25%
9%
6%
54%
31
flagIndia
32%
11%
7%
46%
154
flagNorway
24%
27%
3%
44%
29
flagPakistan
27%
16%
11%
44%
18
flagPoland
30%
15%
9%
43%
9260
flagGermany
28%
12%
11%
43%
116
flagthe United States
34%
11%
11%
41%
353
flagthe United Kingdom
35%
14%
8%
41%
281
flagDenmark
33%
16%
8%
41%
12
flagFrance
15%
34%
11%
38%
26
flagUU
28%
14%
19%
38%
21
flagUkraine
37%
18%
12%
31%
16
flagthe Netherlands
44%
22%
3%
29%
27
flagAustralia
35%
14%
21%
28%
14
flagthe Philippines
45%
18%
13%
22%
22
flagRepublic of Ireland
45%
18%
13%
22%
22

Gender

men46%
women43%
none
33%
30%
one
12%
16%
three
7%
9%
most of them
46%
43%

Details

Author: globalquiz.org
Illustration: Steve Jurvetson
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