87 Saturn. that the rings also revolve in a nearly similar period ; such a motion would tend to keep them steadily in their places, nearly in the plane of Saturn's equator.* In looking through a telescope at this planet astro- nomers may every fifteen years see a curious spectacle, Saturn without a… … years, turning constantly, as has been said, on its axis, and having its axis always pointing in the same direc- tion, in whatever part of its orbit the planet may be. This direction is not perpendicular to the planet's path, as shown at A, but inclined to it, B. The orbit of our Earth is very much…
Astronomy Observers\ manuals
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