Saturn whirls round on his axis once in ten hours, like Jupiter. But his year is much longer than Jupiter’s year: partly because he is twice as far away from the Sun, which means a very much longer journey, and partly because at that distance he goes much more slowly. So one year of Saturn is as long as nearly thirty of our years. A man who on the Earth is seventy would on Saturn be only a little over two years old. In shape Saturn is very flat at the north and south poles, the same as Jupiter. Also on Saturn can be seen dimly-colored bands and markings. But these are much less clear than on Jupiter. [Illustration: _Jupiter._] [Illustration: _Saturn._] However Saturn has something which Jupiter has not: Saturn has his Rings. Until telescopes were made these rings could not be seen; and when first noticed they were a great puzzle. They lie round the vast globe of Saturn, one outside another, stretching far away up into Saturn’s sky. If you were on Saturn, standing just underneath the rings, the most you could see would be a narrow rim, or line, far over your head. But if you walked some distance off, in the right direction, you would have a lovely view of the rings, as wide bands, one above another, shining in the sunlight. For the rings of Saturn, like the eight moons of Saturn, have no brightness of their own. They shine when the Sun shines on them. And the Sun, as seen from Saturn, is very far off, and very small, compared with the big round orb which we see in our sky. Those rings and moons must shine but dimly, compared with the shining of our bright Moon. Yet, since _we_ can see them and find them lovely, even across all this great width of distance, they must surely be beautiful seen from Saturn. But to talk of anybody walking about on Saturn, to gaze at the rings, is really only nonsense. For Saturn, like Jupiter, seems to be only a half-cooled world--in fact, even less cooled, less solid, than Jupiter. Nobody could very well walk across great masses of heated and seething clouds in a perpetual turmoil of storms. I think we may safely say that Saturn at present would not offer a very comfortable home, at all events, for any such living creatures as we know upon the Earth. URANUS, the next planet outside Saturn, was seen first, rather more than a hundred years ago, by a famous English astronomer named Herschel. It takes Uranus 84 Earthly years to travel once round the Sun, at a rate of about four miles each second. So a man of 84 on Earth would be only just one year old on Uranus. Four moons journey with Uranus; and some glimpses have been caught of very faint band-markings on the planet, like those of Jupiter and Saturn. Little can be seen or known of worlds so far away: but it is most likely that Uranus and Neptune are both more or less in the half-hot state of the two big twin planets. Both Uranus and Neptune are light in make, weighing about the same as water.