A Martian Autumn Begins . ... Colorado ), NASA Explanation: Today is the first day of Autumn in the Northern Hemisphere of Planet Earth. ... Mars has seasons too and for the same reason that Earth does -- like Earth, Mars' axis of rotation is tilted with respect to the plane of its orbit around the sun. Eleven days ago Autumn also came to Mars' Northern Hemisphere and the Hubble Space Telescope recorded this image of the red planet to look for seasonal changes in the Martian weather . ...