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This month's Challenge Question: Specs & Techs from IHS Engineering360:
A group of settlers are debating possible locations for a
Mars colony. All proposed settlement sites are located in the northern
hemisphere. When asked why this is, the settlers responded "For the longer
growing season." Why would one hemisphere of Mars have a longer growing season
than the other?
And the answer is:
Mars has approximately the same tilt as the Earth (Mars =
25° vs Earth=23.5°). So just like Earth, Mars has seasons depending upon its
position in its orbit. However, compared to Earth, Mars has a very elliptical
orbit (Mars = 0.094, Earth=0.017). That means the length of the seasons vary
more than on Earth due to changes in orbital speed as Mars orbits the Sun. In
the northern hemisphere of Mars, the seasons are as follows:
Spring - 7 months
Summer - 6 months
Fall - 5.3 months
Winter - 4 months
The situation is reversed in the southern hemisphere of Mars where Spring
lasts 5.3 months, Summer lasts 4 months, Fall lasts 7 months and Winter lasts 6
months.
Thus the growing season is longer in the northern hemisphere
of Mars.
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