Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 232
n 1864he includes no globular clusters of stars. In theseclusters the stars areseen much nearer to-gether than in thePleiades. With asmall telescope theycannot always beseparated, and thecluster might betaken for a nebula;but with a largertelescope they areresolved into separ-ate stars.… … Diag. LXXXVI.—Cluster of Stars. 222 ASTRONOMY ber of stars in some of these clusters have beencounted. In a photograph of the southern clusterround <o Centauri, Prof. Bailey found more than 5000stars in a small area occupying about as much spaceas the Sun or Moon in the sky. Till we know…
Astronomy
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