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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
flagAustria
48%
36%
7%
7%
41
flagthe United States
44%
40%
8%
5%
103
flagIndia
37%
34%
16%
10%
190
flagPakistan
33%
33%
33%
0%
12
flagSwitzerland
31%
50%
13%
4%
22
flagGermany
30%
41%
17%
10%
199
flagPoland
29%
29%
17%
22%
3366
flagthe United Kingdom
24%
50%
20%
6%
50
flagAustralia
24%
56%
4%
16%
25
flagCanada
18%
63%
18%
0%
11

Olympus Mons is the largest known volcano. Where is it?

in Australia
in Indonesia
in Antarctica
on Mars

Which rover was the first to explore Mars?

Curiosity
Opportunity
Sojourner
Spirit

Mars colonisation is a hype topic. What is the biggest threat for those wishing to take a part in a journey to Mars?

low temperatures
lack of oxygen
poor gravity
cosmic rays

Most of the planets of the Solar System were known in the antiquity. Which one was the first discovered in modern times with a telescope?

Neptune
Uranus
Jupiter and Saturn
Pluto