system
Given the following post, respond as if you're commenting on Reddit:
human
Are there seasons on other planets?

I was wondering, since the Earth has discernible seasons throughout the year, do other planets have seasons that scientists have observed? If there are, what changes happen in those planets? This question isn't limited to the solar system that Earth is in, I just want to know if other planets display signs of what we call seasons.
gpt
Yes! 

Planets (and many moons) have seasonal shifts and changes.

For example, as winter on Mars approaches, Carbon dioxide gas actually precipitates out of the atmosphere and falls as CO2 snow. When spring comes again it re-vaporizes. 

Similar thing on Pluto: nitrogen precipitates out of the atmosphere and falls as nitrogen snow in the winter. Then re-vaporizes during Pluto's spring/summer. 

Even minor-planets likely have seasons, including Ceres, which orbits the sun between Mars and Jupiter. 

Heck even, comets have seasons as well, in which summertime (closest approach to sun) triggers tremendous out-gassing forming an actual tail.