Fig. 445.
Fig. 446.
382. Condensation of Nebulæ.—The appearance of the nebula just mentioned suggests a body rotating on its axis, and undergoing condensation at the same time.
It is now a generally received theory that nebulæ are the material out of which stars are formed. According to this theory, the stars originally existed as nebulæ, and all nebulæ will ultimately become condensed into stars.
Fig. 447.
Fig. 448.