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第185节（第9201-9250行） (185/3207)
so
the
comets
drift
in
a
stately
manner,
moving
at
only
about
220
miles
an
hour.
fromtime
to
time
some
of
these
lonely
comets
are
nudged
out
of
their
normal
orbit
by
some
slightgravitational
perturbation—a
passing
star
perhaps.
sometimes
they
are
ejected
into
theemptiness
of
space,
never
to
be
seen