Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 279
der the intense heat to which a comet issometimes exposed. Comets, indeed, have been known tosweep round the sun so closely as to pass within a seventhpart of its radius from the surface. It seems that certain 264 Star-L.wd. materials present in the comet, when heated to this extra-ordinary… … Fig. 74.— Huw the Tail of a Comet arises. into being was a torment from which they were endeavour-ing to escape. The tail of a comet is, therefore, not a permanent partof the body. It is more like the smoke from a greatchimney. The smoke is being incessantly renewed at oneend as the column gets…
Astronomy
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