Do any other planets experience seasons?
Yes, plenty! For a planet to have seasons as we normally perceive them, its axis of rotation must be tipped over at an angle, so that the amount of sunlight reaching different parts of its surface changes as it orbits the Sun. In our Solar System, Mars, Saturn and Neptune all have axes tilted at roughly the same angle as Earth’s, so they experience a similar cycle of spring, summer, autumn and winter (though over a much longer period). Uranus is tipped over at a much sharper angle so it experiences even more extreme seasons, while Jupiter, Venus and Mercury are more or less ‘upright’, and don’t experience seasons.
Answered by Giles Sparrow