Recreations in astronomy : with directions for practical experiments and telescopic work (1879)
Warren, Henry White, 1831-1912 · New York : Harper & Brothers · leaf 237
lie takes a thousand years to lift hishand off. • • •• • • : . I! m 1 1 • € ■ • • * 19ffiBNifl 11 Nebula abore*5Tavri 1 ... Nebula, near ( i.iun. i&ee frouu*piece.) There arc many unsolved problems connected withthese strange bodies. Whether they belong to our sys-tem, or are beyond it, is not… … Fig. 80.—The Riug Nebula. if examined by methods sufficiently delicate and exact,would be found to be variable. The variations of some VARIABLE STARS. 221 Btare arc so marked as to challenge investigation. j3 Lvrae I Fig. M | lias two maxima and minima of light. In N E + E4 ^ I^aor^^ a Lyrer •*-…
Astronomy
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