In fact, Mars has an orbit much more eccentric than the Earth's, and its perihelion cycle (which has a period of 51,000 years) does apparently have a significant effect on climate and prevailing wind direction there.he two effects â the precession of the axis of rotation and the change in the orbit's orientation â work together to shift the seasons with respect to perihelion. Because we use a calendar year that is aligned to the occurrence of the seasons, the date of perihelion gradually regresses through the year.
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alphateng asked on. Hi all, I noticed two computers, both are ACER Aspire 7740G-6969 and freshly bought from store with windows 7 in it, could have different log-in screen background. Mine has the log-in background with blue color overall from Windows, whereas my friend's has the overall green color background with ACER logo instead of Windows.