Uranus’ moons can have short-lived atmospheres with each season. The seasons there are so intense that these tenuous atmospheres, called exospheres, can exist for short periods twice a year on Uranus before freezing back to the surface.
Uranus’ poles are extremely tilted relative to the planet’s orbit around the sun, which, combined with its strong magnetic field, makes Uranus’ seasons particularly extreme. ben theoris Researchers at Southwest Research Institute in Texas used laboratory experiments to understand how carbon works.
Source: www.newscientist.com