SLIDE 3.
A million years pass
as the sun brightens, and the rotating cloud of gas and dust begins
to partition. Out beyond the dew line, where ice particles can
grow, a roiling knot of dirty ice is forming, and like the sun
before it, it greedily sucks down dirt and gas and grows. As it
plows through the cloud, it sprays dust outward. Meanwhile, at the
balancing point between the star and the embryonic Jovian gravity
well, other knots of dust are forming . . .