THE PLANET SATURN.
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would, however, soon appear broader; but presently, when hemight have reached such a latitude that a straight line fromthe inner edge of the ring c would touch the planet, that ringwould graze his horizon. As he might journey to still higherlatitudes, first the ring c, next the ring b, and finally the ringa would altogether disappear from his view.
This is indicated in Fig . LXXXYIII., in which it is shownthat at c, in a latitude of rather less than 41°, c, the inneredge of the dusky ring, would touch the horizon, c c; while atb, in a latitude of about 51jr°, b, the inner edge of the nextring, would in like manner only just be seen. At a, in a
latitude of about 62^°, a, the inner edge of the outermost ring,would disappear ; and at r, in a latitude of not quite 66^°, thewhole system, whose breadth is shown by rabc, would bebelow the horizon, Br, and consequently invisible; as wouldalso be the case at all places nearer to either pole of the planetthan r.
It may therefore be some satisfaction to any unfortunateinhabitants, if such there be within the arctic circles of Saturn,which are situated at about 27° from its poles (or in a latitudeof 63°), that, except within some 3^° of those circles, they havenothing to do with the shadow of the rings. The small amountof sunlight left to them during their winter is therefore not