It can't be sunlight, because the poor old Sun doesn't seem to have strength enough to make a decent sunset or sunrise here, and look how it's running along to the westward! What does that mean, do you think ?" "I should say it means that some half-formed Jovian Continent has been flung sky high by a big burst-up underneath, and that's the blaze of the incandescent stuff running along.

Just fancy a continent, say ten times the size of Asia, being split up and sent flying in a few moments like that.

Look! there's another one to the north! On the whole, dear, I don't think we should find the climate on the other side of those clouds very salubrious.

Still, as they say the atmosphere of Jupiter is about ten thousand miles thick, we may be able to get near enough to see something of what's going on.
"Meanwhile, here comes Calisto.

Look at his shadow flying across the clouds.