Fig. 449.
383. Other Spiral Nebulæ.—Fig. 447 represents a spiral nebula of the Great Bear. This nebula seems to have several centres of condensation. Fig. 448 is a view of a spiral nebula in Cepheus, and Fig. 449 of a singular spiral nebula in the Triangle. This also appears to have several points of condensation. Figs. 450 and 451 represent oval and elliptical nebulæ having a spiral structure.
Fig. 450.
Fig. 451.
Fig. 452.