QUESTION:
Is one side of Jupiter hot and one side cold? At places where the
sides meet is the temperature medium?

ANSWER from Laura Barnard on March 27, 1997:
Jupiter is a huge gaseous planet that rotates just like the Earth so
there is one side that is in the light of the sun, and another side
that is in the dark.  As Jupiter rotates the areas change just like
our night and day.  Do you think it is cooler in the shade?  I do.
However you should know that Jupiter has a surface temperature of
around 120 degrees Kelvin (-307.4 degrees Fahrenheit), which is VERY
cold! The effects of the sunlight during the day cycle are very small
so ski clothes and thermal underwear won't keep you warm there!