How long is stellar year on Mars?

687 Earth days
423 Earth days
183 Earth days
121 Earth days
The Martian year is almost twice longer than Earth's year.
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Answers by country

687 Earth days
423 Earth days
183 Earth days
121 Earth days
answers
flagUnknown
75%
16%
0%
8%
12
flagGermany
43%
35%
14%
6%
48
flagthe United States
37%
43%
10%
8%
58
flagIndia
36%
34%
20%
9%
99
flagPakistan
30%
30%
40%
0%
10
flagPoland
27%
26%
18%
27%
2509
flagAustralia
22%
50%
5%
22%
18
flagCanada
20%
60%
20%
0%
10
flagthe United Kingdom
11%
66%
11%
11%
18