Saturn
the most remote of the planets known to the ancients. Its orbit is outside of that of Jupiter. Its distance from the sun is 9 1/2, its surface 84, its volume 768, its diameter 9, its mass 95 times that of the earth. A mass of 100 on the earth would weigh about 120 on the surface of Saturn. Its day is ten hours and fourteen seconds in length, giving a high rotary velocity. Its density is only two-thirds that of water, indicating in part, at least, a gaseous condition. The most remarkable feature of Saturn is that it is surrounded by three enormous whirling rings with a common center, that is to say, one outside of another, as though they had been cut from one sheet of material fifty miles in thickness. These rings are apparently made up of a swarm of small particles, possibly no larger than those of a dust storm. Saturn has eight or possibly nine moons. The largest of these moons is Titan. The ninth moon, Phoebe, has never been seen in the telescope, but it has been photographed. It has been suggested that the rings may some day collect into additional satellites. See Bode; Planets