Berry, Arthur,b. 1862 · London, J. Murray · leaf 256
Fig. 65.—Saturn, with the ring seen edge-wise. From the Systana Saturnium. [To face [>. 200. … 202 A Short History of Astronomy [Ch. viii. of Saturn ; farther off still the ring appears wider and theopening becomes visible; and about seven years beforeand after the periods of invisibility (at a and c) the ringis seen at its widest. Huygens gives for comparison withhis own results a number of…
Astronomy
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