giant mystery

Cassini showed us Saturn's atmosphere
convecting like to soar there should be fun
but only nine percent of what shines here
impinges there, so distant from the sun
the latent heat ammonia gas conceals
to form a cloud, and rain back towards the core
is barely half what water vapor feels
but there, when driven less, the storms rage more
ongoing gravitational collapse
could keep gas giants warmer than their peers
but I'd expect that's done in weeks, perhaps
and should be spent before four billion years.
The second-biggest planet in night's sky
has raging tempests. No one can say why