Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 148
th of the equator, the north side of the ring isilluminated; when south, the south side; while whenthe Sun is on the equator, only the edge of thering. The ring is so thin that it is invisible tous when the Sun is in such a direction that it onlyshines on the rings edge. Generally the Earth andSun… … Diag. LXIV. —Saturn. the ring was discovered by Cassini in 1675 separatingit into two, and in 1850 it was seen to be con-tinued on its inner rim by a dusky ring. The 138 ASTRONOMY nature of Saturns ring was n:ade clear by ClerkMaxwell in 1856. He showed that it could be neithera solid nor a liquid,…
Astronomy
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